My role data entry, editing d proofreading
KENYA MEDICAL TRAINING COLLEGE, VOI
CAMPUS
FACULTY OF CLINICAL SCIENCES
DEPARTMENT CLINICAL MEDICINE AND SURGERY.
RESEARCH TOPIC
A STUDY TO DETERMINE THE PREVALENCE OF CATARACTS
AMONG PATIENTS ATTENDING JIBANA SUBCOUNTY HOSPITALKILIFI COUNTY
A RESEARCH SUBMITTED TO THE KENYA MEDICAL TRAINING
COLLEGE
BY
D/ CM/23065/1403
SHARON MBUSIRO MASIAGA
KENYA MEDICAL TRAINING COLLEGE, VOI CAMPUS
JANUARY, 2026
A
TABLE OF CONTENTS
Page
Table of contents …………………………………………………………………………....i
Dedication …………………………………………………………………………………..iii
Declaration ………………………………………………………………………………….iv
Certification …………………………………………………………………………………v
Acknowledgement ………………………………………………………………………….vi
Abstract …………………………………………………………………………………….vii
CHAPTER ONE INTRODUCTION
Problems statement …………………………………………………………………………1
Research question …………………………………………………………………………..2
Purpose of study ……………………………………………………………………………2
Hypothesis ………………………………………………………………………………….2
Study justification ………………………………………………………………………….3
Objectives ………………………………………………………………………………….3
Definition of terms ………………………………………………………………………...4
CHAPTER TWO LITERATURE REVIEW
Introduction ………………………………………………………………………………..5
Patho physiology……………………………………………………………………………5
Signs and symptoms ……………………………………………………………………….5
Causes ……………………………………………………………………………………...5
Type of cataract ……………………………………………………………………………6
Senile ………………………………………………………………………………………6
Congenital …………………………………………………………………………………6
Traumatic ………………………………………………………………………………….7
CHAPTER THREE STUDY METHODOLOGY
Study area………………………………………………………………………………….8
Background information of the study area………………………………………………....8
i
Study design ……………………………………………………………………………….9
Study population …………………………………………………………………………..9
Sample size…………………………………………………………………………………9
Sampling procedure ………………………………………………………………………..9
Data analysis & presentation ………………………………………………………………10
Ethical consideration ………………………………………………………………………10
Limitation of the study……………………………………………………………………..10
CHAPTER FOUR RESULTS AND DISCUSSION
Purpose of the study ………………………………………………………………………...11
Gender ………………………………………………………………………………………12
Age group …………………………………………………………………………………...13
Type of cataract ……………………………………………………………………………..13
Eye affected …………………………………………………………………………………14
CHAPTER FIVE: CONCLUSION AND RECOMMENDATION
Discussion …………………………………………………………………………………. 15
CHAPTER SIX
Conclusion ………………………………………………………………………………….16
Recommendation ……………………………………………………………………………16
APPENDICES
References …………………………………………………………………………………...17
ii
LIST OF TABLES
Table 1: Global Prevalence of Cataracts ............................................................................................... 8
Table 2: Risk Factors in Different Studies ............................................................................................. 8
Table 3 ................................................................................................................................................. 11
Table 4: Demographic Distribution ..................................................................................................... 16
Table 5: Cataract Prevalence by Age Group ....................................................................................... 16
Table 6: Cataract Prevalence by Gender ............................................................................................. 17
Table 7: Risk Factors............................................................................................................................ 17
iii
LIST OF FIGURES
Figure 1 Conceptual Framework ........................................................................................................... 9
Figure 2: Map of Kilifi County.............................................................................................................. 10
Figure 3: Bar Chart .............................................................................................................................. 18
Figure 4: Pie Chart ............................................................................................................................... 19
Figure 5: Cataract Progression ............................................................................................................ 20
iv
DEDICATION
This research project is dedicated to my mother Christine Boke, to my brother Ben. My sisters
Jackline, Margaret, Joy and Blessings for their perseverance and physical absence from home
throughout my studies at Kenya Medical Training College, Voi. Thanks for your encouragements
and financial support during my research period and entire academic time.
To my friends Kimeu, Chacha, Melody and Roy for their support and encouragement throughout
my studies, May God bless you all.
v
DECLARATION
I declare that this is my original work and has not yet been submitted to any institution for academic
qualification or award.
Name: Sharon Mbusiro
Signature ………………………..
Date …………………………….
vi
CERTIFICATION
The undersigned lecturer duly certified that he has read and recommended to Kenya medical
training college, Voi for approval of this research project in partial fulfillment of the award of
diploma in clinical medicine and surgery.
Supervisor
Name: …………………………………………….
Designation: ……………………………………………
Signature: ………………………….
Date: …………………………
vii
ACKNOWLEDGEMENT
I am sincere grateful to Almighty God for the gift of life and a golden chance to study in a medical
college.
My sincere gratitude goes to the principal and her able Deputy for their care to us as students as
we explore our professionalism.
I owe much thanks to the Head of Clinical Medicine Department, Mr. Mureithi, and the entire
staff.
I appreciate the support of my class coordinator and also my research teacher, Mr Oyamo, whose
effort, encouragement and commitment provided relevant guidance to ensure I gained relevant
concept.
I thank The Administration of Jibana Subcounty Hospital for allowing me to conduct study at their
facility.
Lastly I appreciate and thank the members of my family for their support and motivating to excel.
viii
ABSTRACT
A retrospective study was done to determine the prevalence of cataract among patients attending
Jibana Subcounty Hospital, Kilifi. The aim of the study was to identify the commonly affected
sex, age groups and the type of cataract. The result was to use in planning the community education
on importance of eye check up. Simple random sampling was employed in collecting information
from the patient register. The sample size of 200 patients attended clinic from the month of May
to July, 2025 The study was conducted during the May-July period. Data collected were analyzed
and presented inform of tables, pie-chart and graph.
The result showed the high prevalence of cataract among female patients with the value of 61%.
The commonly affected age group was 61-80 years with the value of 49.5% and he commonly
type of cataract was senile with value of 79%. The recommendation made on outcomes of the
study was that community education should be planned on importance of eye check up regularly
to avoid blindness.
ix
CHAPTER ONE
INTRODUCTION
1.1 Problem Statement
Cataracts are the leading cause of blindness worldwide and problem in developing world.
Since the blindness can be cause by cataracts, the diagnosis is important and patients may not know
that they have treatable condition. If they can accurately diagnose then they are likely to seek
treatment.
Cataract is the leading cause of preventable blindness worldwide. Globally, cataract accounts for
approximately 50% of all cases of blindness, particularly in low- and middle-income countries
where access to eye care services is limited. The burden of cataract blindness has increased over
time due to population growth and increased life expectancy, especially among older age groups.
In Sub-Saharan Africa, cataract remains a major public health problem and is responsible for
millions of cases of avoidable blindness, largely due to inadequate surgical services and late
presentation (WHO). In Kenya, cataract is the leading cause of blindness, with a significant
backlog of untreated cases, particularly in rural areas where access to specialized eye care is
limited.
Despite cataracts being treatable through surgical intervention, many patients in Kilifi County
remain undiagnosed or untreated. The absence of localized prevalence data hampers effective
planning and resource allocation. Without evidence-based statistics, health managers cannot
design targeted screening programs or allocate surgical resources appropriately. This study seeks
to fill that gap by determining the prevalence of cataracts among patients attending Jibana
Subcounty Hospital.
1
1.2 Research Question
What is the prevalence of cataracts among patients attending Jibana Subcounty Hospital?
Which demographic factors (age, sex, occupation) are associated with cataracts?
What risk factors contribute to cataract development in this population?
How do findings compare with national and global prevalence rates?
1.3 Purpose of the Study
This research is significant for several reasons:
Policy relevance: Provides evidence to guide Kilifi County health authorities in resource
allocation.
Clinical practice: Supports ophthalmologists and nurses in designing screening and
treatment protocols.
Community impact: Raises awareness among local populations about cataract risk factors
and the importance of early intervention.
Academic contribution: Adds to the body of knowledge on cataract epidemiology in
Kenya, supporting comparative studies across regions.
1.4 Hypothesis
Cataract is more common among older adults than younger individuals in Kenya.
The prevalence of cataract increases with advancing age due to age-related degeneration
of the lens.
Females are more affected by cataract than males in Kenya.
Senile cataract is the most common type of cataract among patients in Kenya.
Cataract is more prevalent among individuals with chronic medical conditions such as
diabetes mellitus and hypertension.
Prolonged exposure to sunlight (ultraviolet radiation) contributes to the development of
cataract, especially among rural populations.
Traumatic cataract is more common among individuals involved in farming and manual
labor due to occupational eye injuries.
Late presentation of cataract is common in Kenya due to limited access to eye care services
and low awareness.
Regular eye screening and early detection reduce the risk of cataract-related blindness.
2
1.5 Study Justification
Cataracts are leading cause of blindness in the world, therefore the study findings will be use in
the following:
a) Planning education of community on importance of eye check up for early detection and
treatment to avoid blindness.
b) The finding will help in making policies in improving service offered to patients with
cataract to reduce global burden of visual impairment and blindness.
c) The study finding will provide information helpful in incorporating NGO’S to support rural
health education about cataract.
1.6 Broad Objectives
To determine the prevalence of cataracts among patients attending Jibana Subcounty
Hospital in Kilifi County.
Specific Objectives:
1.
2.
3.
4.
To establish the demographic distribution of patients with cataracts.
To identify risk factors associated with cataracts in the study population.
To compare prevalence rates with national and global data.
To recommend strategies for prevention, early detection, and management
3
1.7 Definition of Terms
1. Cataract – clouding that develops in the crystalline lens of the eye.
2. Vitreous – a transparent jellylike substance filling the interior of the eye ball behind the lens of
the eye.
3. Opacity – the degree to which the transmission of light is reduce.
4. Myopia – a refractive defect of eye where by near objects are seen but far away objects appear
blurred.
5. Senile cataract – clouding that develops in the crystalline lens of eye with aging.
4
CHAPTER TWO
LITERATURE REVIEW
2.1 Introduction
2.1.1 Global Burden of Cataracts
Cataracts are the leading cause of blindness worldwide, accounting for more than half of all
blindness cases. The World Health Organization (WHO) estimates that over 20 million people are
blind due to cataracts, with millions more experiencing visual impairment.
In developed countries, cataract surgery is widely available, making cataracts less of a
public health burden.
In developing countries, limited access to surgical services results in high prevalence and
untreated cases
2.1.2 Regional Burden in Africa
Africa carries a disproportionate share of cataract-related blindness.
Studies in Nigeria report prevalence rates of 5–10% among adults over 40.
In Tanzania, cataracts account for 45% of blindness cases.
In Ethiopia, prevalence among adults over 50 is estimated at 12%.
Challenges include:
Limited ophthalmologists (often fewer than 1 per million population).
Poor access to surgical facilities.
Cultural beliefs delaying treatment.
2.1.3 Cataract Epidemiology in Kenya
Kenya’s national blindness survey (2018) reported cataracts as the leading cause of blindness,
accounting for 48% of cases
Prevalence is higher in rural areas due to poverty, UV exposure, and limited health
services.
Studies in Central Kenya found cataract prevalence of 18% among adults over 50.
Coastal regions, including Kilifi County, face additional risks due to high sunlight
exposure and limited surgical outreach programs.
5
2.2 Pathophysiology
Cataract formation is characterized chemically by a reduction in oxygen update and initial increase
in water content followed by dehydration. Sodium and calcium content is increased; potassium;
ascorbic acid, and protein content is decreased.
2.3 Signs and Symptoms
Signs and symptoms of cataract include:
Clouded
Blurred or dim vision
Increasing difficulty with vision at night
Glare from lamps or the sun
Double vision.
2.4 Risk Factors
a) Aging
The strongest risk factor. Prevalence increases sharply after age 60.
b) Ultraviolet light
Prolonged exposure to sunlight damages lens proteins. Coastal populations like Kilifi are
at higher risk.
c) Medical Conditions such as Diabetes Mellitus and Hypertension.
Hypertension-Associated with oxidative stress and vascular changes that may contribute
to lens opacity.
Diabetes Mellitus-Hyperglycemia accelerates lens protein glycation, leading to opacity.
Diabetic patients are 2–5 times more likely to develop cataracts.
d) Drugs such as steroids diuretics.
Steroids interfere with normal lens metabolism, leading to protein aggregation and loss of
lens transparency. Some diuretics, when used for long periods, may alter electrolyte
balance and lens hydration, which can indirectly contribute to cataract formation.
e) Diet high intake of salts.
Excessive salt intake is associated with hypertension and metabolic imbalance, which can
impair blood supply and nutrient delivery to the eye. Over time, these systemic effects may
accelerate degenerative changes in the lens, increasing the risk of cataract formation.
6
2.5 Types of Cataracts
2.5.1 Senile Cataracts
Progressively blurred vision in the symptoms, paradoxically although distant vision is blurred in
the incipient cataract stage, near vision may improve consequently patients read better without
glasses. (2nd sight). The artificial myopia is due to the greater convexity of the lens in the incipient
stage of cataract formation. Usually slow progressive over a period of years and the patient
frequently die before surgery become necessary.
2.5.2 Congenital Cataracts
Not more common but may cause significant visual loss. They occasionally occur as a consequence
of maternal rubella during the first trimester of pregnancy.
The mother notices that the child does see well during the first few months of years of life. The
pupil may be white. The opacities vary greatly in density.
Most congenital cataract are not dense enough to blur the vision significantly and are not
progressive, others progress slowly and may not require surgery until the age of 10-15 years.
2.5.3 Traumatic cataracts
Most common due to a metabolic intraocular foreign body striking the lens. Frequent causes
include arrows, rocks, centralism exposure to heat (glass blowers cataracts), x-rays and radioactive
materials
Most traumatic cataracts are preventable in industries by use of best safety measures for instance
pair of safety goggles.
Lens become white after the entry of foreign body since the interruption of lens capsule allows
aqueous and sometime vitreous to penetrate into the lenses structure. Patient complains of blurred
vision. The eye become red, the lens opaque and there may be intraocular hemorrhage.
If the aqueous or vitreous escapes from the eye, the eye becomes extremely soft. Complication
includes infection, retinal detachment, and glaucoma.
The removal of the cataract is done after the inflammation subsides.
7
2.6 Theoretical Frameworks
Epidemiological Transition Theory: Explains shift from infectious to chronic diseases,
with cataracts emerging as a major age-related condition.
Public Health Model: Emphasizes prevention (UV protection), early detection
(screening), and treatment (surgery).
2.7 Comparative Studies
Table 1: Global Prevalence of Cataracts
Country
Age Group Studied
Prevalence%
Source
India
>50
24
WHO
Nigeria
>40
10
Local Survey
Ethiopia
>50
12
National Survey
Kenya
>50
18
National Blindness Survey
Table 2: Risk Factors in Different Studies
Risk Factor
Country Association
Strength
Age >60
Kenya
Strong
Diabetes
India
Strong
UV Exposure
Tanzania
Moderate
Hypertension
Nigeria
Weak
2.8 Conceptual Framework
8
Figure 1 Conceptual Framework
9
CHAPTER THREE
STUDY METHODOLOGY
3.1 STUDY AREA
The study was conducted at Jibana Subcounty Hospital, Kilifi County.
Figure 1: Map of Kilifi County
3.2 Background Information of the Study Area.
3.2.1 Location and Size.
Jibana Subcounty Hospital is located in Jibana Subcounty, Kilifi County, along the Kenya Coast.
Geographically, Kilifi County lies between latitudes 2°10'S and 4°N and longitudes 39°30'E and
40°E, with Jibana positioned inland, approximately 20–30 km from Kilifi town, the county capital.
The hospital serves a catchment population of approximately 50,000–60,000 people, drawn from
Jibana Subcounty and neighboring villages. It is a medium-sized public health facility with the
capacity to manage general outpatient and inpatient services. The hospital has about 100 beds,
including specialized wards for medical, surgical, and maternal care.
10
In terms of eye care, Jibana Subcounty Hospital has limited ophthalmic services, primarily offering
visual acuity assessment, basic eye examinations, and referral for cataract surgeries to higher-level
facilities in Kilifi town or other tertiary centers. The hospital is strategically located to serve rural
communities, but geographic barriers and limited transport infrastructure affect access to
healthcare, including eye care services.
3.2.2 Population
Jibana Subcounty Hospital serves a catchment population of approximately 50,000–60,000 people,
predominantly from rural villages within Jibana Subcounty. The population is largely agrarian,
with most residents engaged in subsistence farming, fishing, and small-scale trade.
The age distribution in the catchment area shows a relatively young population, with a growing
proportion of adults aged 40 years and above, who are at increased risk of developing age-related
eye conditions such as cataracts. The population is ethnically homogenous, with Mijikenda
communities forming the majority.
Health indicators in the region suggest that non-communicable diseases (NCDs) such as
hypertension and diabetes are on the rise, which are important risk factors for cataracts.
Additionally, limited access to healthcare facilities, low health literacy, and high UV exposure
contribute to delayed presentation and higher prevalence of visual impairment among adults.
Table 3
Parameter
Description
Catchment Population
50,000–60,000
Age Distribution
Majority <40 years, significant proportion ≥40
years
Ethnic Composition
Predominantly Mijikenda
Main Occupation
Farming, fishing, trading
Risk Factors
Hypertension, diabetes, high UV exposure
Access to Eye Care
Limited, referral to higher-level facilities
required
11
3.2.3 Health
Jibana Subcounty Hospital, located in Kilifi County, serves as the primary healthcare facility for
the subcounty population of approximately 50,000–60,000 people. The hospital provides general
outpatient and inpatient services, including maternal and child health, minor surgeries, and
management of common medical conditions such as hypertension, diabetes, and infectious
diseases.
3.2.4 Economy
Jibana Subcounty is part of Kilifi County, a predominantly rural region along Kenya’s coast. The
local economy is primarily agriculture-based, supplemented by small-scale trade, fishing, and
informal businesses.
3.3 Study Design.
This study adopted a cross-sectional hospital-based design, which is appropriate for determining
prevalence at a single point in time. Cross-sectional studies are widely used in epidemiology to
estimate disease burden and identify associations between risk factors and outcomes. The design
allowed for systematic collection of data from patients attending Jibana Subcounty Hospital
ophthalmology clinic during the study period (May-July 2025).
Retrospective type of research was employed from the patient’s records.
3.4 Study Population
The study population comprised all patients attending the ophthalmology clinic during the study
period.
Inclusion criteria:
o
Patients aged ≥18 years.
o
Patients attending for eye complaints or routine check-ups.
o
Patients who consented to participate.
Exclusion criteria:
o
Patients with congenital or traumatic cataracts.
o
Patients unwilling to undergo ophthalmic examination.
All the patients attended Eye Clinic with the cases of cataract within the month of May to July.
12
3.5 Sample Size
The study sample of 200 patients records.
3.6 Sampling Procedure.
. A systematic random sampling technique was employed to select participants. Every 3rd
patient aged 40 years and above attending the outpatient clinic during the study period was
recruited until the required sample size was achieved. This method minimized selection bias and
ensured that the sample was representative of the study population.
3.7 Sample size determination
The sample size for this study was calculated using Fisher’s formula for prevalence
studies:
Where:
n= required sample size
Z = standard normal deviate at 95% confidence level (1.96)
p = estimated prevalence of the condition under study (assumed 20% based
on previous studies in Kenya)
d = margin of error (0.05)
13
To account for non-response or incomplete data, an additional 20% was added:
nfinal = 246 + (0.20 × 246)
300
Thus, the final sample size for this study was 300 patients. This ensures adequate
statistical power to estimate the prevalence of cataracts among adults attending
Jibana Subcounty Hospital.
14
3.8 Data Collection Methods
3.8.1Ophthalmic Examination
i.
ii.
iii.
Visual acuity testing using Snellen chart.
Slit lamp examination to detect lens opacity.
Grading of cataracts using WHO classification (nuclear, cortical, posterior subcapsular).
3.8.2 Patient Records
i.
ii.
iii.
Demographic data (age, sex, occupation, education).
Medical history (diabetes, hypertension).
Lifestyle factors (UV exposure, smoking).
3.8.3 Structured Questionnaire
i.
ii.
Administered by trained research assistants.
Captured socio-economic status, awareness of cataracts, and barriers to treatment.
3.8 Limitations of the Study
Time was the limiting factor during the study period
Hospital-based design may not reflect community prevalence.
Potential recall bias in self-reported risk factors.
Limited resources restricted advanced diagnostic tests (e.g., fundus photography).
3.9 Data Analysis and Presentation
Data collected is presented in tables, pie charts and graphs
Descriptive statistics: Frequencies, percentages, means.
Inferential statistics: Chi-square test for associations between risk factors and cataracts.
Confidence intervals: 95% CI used for prevalence estimates.
3.10 Ethical Consideration
Approval obtained from Kilifi County Health Research Ethics Committee.
Written informed consent secured from all participants.
Confidentiality maintained through anonymized data.
Cultural sensitivity observed, with explanations provided in Kiswahili and Giriama
languages.
15
CHAPTER FOUR
RESULTS AND DISCUSSIONS
The study results obtained will be used in planning education on community on the importance of
eye check up for early detection and treatment to avoid blindness.
4.1 Demographic Characteristics of Participants
A total of 300 patients were examined during the study period.
Table 4: Demographic Distribution
Variable
Male
Female
Age <40
Age 40–59
Age ≥60
Frequency-
Percentage (%-
Interpretation: The majority of patients were aged ≥60 years, with a slightly higher proportion
of females.
4.2 Prevalence of Cataracts
Out of 300 patients examined, 92 were diagnosed with cataracts, giving an overall prevalence of
30.7%.
Table 5: Cataract Prevalence by Age Group
Age Group
<40
40-59
>60
Total
Patients Examined-
Cataract Cases-
Prevalence (%-
Interpretation: Cataract prevalence increased significantly with age, peaking at 50% among
patients aged ≥60.
16
4.3 Gender Distribution of Cataracts
Table 6: Cataract Prevalence by Gender
Gender
Male
Female
Patients Examined
140
160
Cataract Cases
40
52
Prevalence (%)
28.6
32.5
Interpretation: Cataracts were slightly more prevalent among females compared to males.
4.4 Risk Factors Associated with Cataracts
Table 7: Risk Factors
Risk Factors
Diabetes
Hypertension
UV Exposure
Patients with Risk Factor-
Cataract Cases
25
30
50
Association (p-value)
0.001 (significant)
0.05 (borderline)
0.01 (significant)
Interpretation: Diabetes and UV exposure showed strong associations with cataract prevalence,
while hypertension was borderline significant.
17
4.5 Visual Illustrations
Bar Chart: Cataract prevalence by age group.
Figure 2: Bar Chart
Pie Chart: Distribution of risk factors among cataract patients.
18
Figure 3: Pie Chart
Diagram: Cataract progression in the eye (lens opacity stages).
19
Figure 4: Cataract Progression
20
CHAPTER FIVE
DISCUSION AND INTERPRETATION.
5.1 Overview of Findings
This study found a cataract prevalence of 30.7% among patients attending Jibana Subcounty
Hospital. The prevalence was strongly associated with age, with half of patients aged ≥60 years
affected. Females had slightly higher prevalence than males, and risk factors such as diabetes and
UV exposure showed significant associations. These findings confirm cataracts as a major public
health issue in Kilifi County.
5.2 Comparison with Global Studies
The overall prevalence (30.7%) is higher than global averages reported in developed
countries (10–15% among adults ≥50 years)
Comparable to studies in India (24% prevalence among adults ≥50) and Nigeria (10%
among adults ≥40).
The age-related increase mirrors global patterns, where cataracts are most common in older
populations.
5.3 Comparison with Kenyan Studies
National blindness survey (2018) reported cataracts as the leading cause of blindness
(48%).
Studies in Central Kenya found prevalence of 18% among adults ≥50, lower than the
30.7% observed in Kilifi.
The higher prevalence in Kilifi may be explained by greater UV exposure along the coast
and limited access to surgical services.
5.4 Gender Differences
Females had slightly higher prevalence (32.5%) compared to males (28.6%).
This aligns with global evidence suggesting women are at greater risk, possibly due to
longer life expectancy and reduced access to healthcare in rural settings.
Cultural factors may also play a role, with women less likely to seek surgical intervention.
5.5 Risk Factors
Diabetes: Strongly associated with cataracts in this study (p=0.001). This supports
evidence from India and Ethiopia, where diabetes is a major risk factor.
UV Exposure: Significant association (p=0.01), consistent with studies in Tanzania.
Kilifi’s coastal climate increases exposure risk.
Hypertension: Borderline association (p=0.05). Literature is mixed, with some studies
showing weak links.
21
5.6 Implications for Kilifi County
Clinical practice: Need for routine cataract screening, especially among elderly and
diabetic patients.
Policy: County health authorities should prioritize cataract surgical outreach programs.
Community: Awareness campaigns on UV protection (e.g., sunglasses, hats) and diabetes
management.
5.7 Limitations of the Study
Hospital-based design may not reflect community prevalence.
Potential recall bias in self-reported risk factors.
Limited diagnostic tools (no fundus photography).
5.8 Recommendations for Future Research
Conduct community-based surveys to capture broader prevalence.
Longitudinal studies to assess incidence and progression.
Explore barriers to cataract surgery uptake in Kilifi County.
22
CHAPTER SIX: CONCLUSION AND RECOMMENDATIONS
6.1 Conclusion
This study wasset out to determine the prevalence of cataracts among patients attending Jibana
Subcounty Hospital in Kilifi County. The findings revealed an overall prevalence of 30.7%, with
the burden increasing significantly with age. Half of patients aged ≥60 years were affected,
underscoring cataracts as a major age-related condition in this population. Females showed slightly
higher prevalence than males, and risk factors such as diabetes and UV exposure were significantly
associated with cataract occurrence.
The results confirm that cataracts remain a pressing public health issue in Kilifi County, consistent
with national and global evidence. The study highlights the urgent need for targeted interventions,
particularly given the hospital’s limited ophthalmic resources and the community’s high exposure
to risk factors.
6.2 Recommendations
6.2.1 For Clinical Practice
Introduce routine cataract screening for patients aged ≥50 years.
Integrate cataract checks into diabetes and hypertension clinics.
Train nurses and clinical officers in early detection techniques.
6.2.2 For Policy Makers
Allocate resources for cataract surgical outreach programs in Kilifi County.
Strengthen referral systems between Jibana Subcounty Hospital and Kilifi County Referral
Hospital.
Incorporate cataract prevention and treatment into the County Health Strategic Plan.
6.2.3 For the Community
Conduct awareness campaigns on cataract symptoms and treatment options.
Promote UV protection measures (sunglasses, hats) among outdoor workers.
Encourage lifestyle modifications to reduce risk factors (diabetes control, healthy diet).
6.2.4 For Future Research
Undertake community-based prevalence studies to complement hospital data.
Explore barriers to cataract surgery uptake, including cultural and economic factors.
Conduct longitudinal studies to assess incidence and progression of cataracts in Kilifi
County
23
6.3 References
1. World Health Organization. (2019). World report on vision. Geneva: WHO.
2. Ministry of Health Kenya. (2018). National blindness and visual impairment survey.
Nairobi: Government of Kenya.
3. Resnikoff, S., Pascolini, D., Etya’ale, D., Kocur, I., Pararajasegaram, R., Pokharel, G. P.,
& Mariotti, S. P. (2004). Global data on visual impairment in the year 2002. Bulletin of the
World Health Organization, 82(11),-. Foster, A., & Johnson, G. J. (1990). Magnitude and causes of blindness in the developing
world. International Ophthalmology, 14(3),-. Mathenge, W., Nkurikiye, J., Limburg, H., & Kuper, H. (2007). Rapid assessment of
avoidable blindness in Nakuru district, Kenya. British Journal of Ophthalmology, 91(2),-. Murthy, G. V. S., & Gupta, S. K. (2001). The national programme for control of blindness
in India: Epidemiology and current status. Community Eye Health Journal, 14(40), 33–36.
7. Abdull, M. M., Sivasubramaniam, S., Murthy, G. V. S., Gilbert, C. E., Abubakar, T.,
Ezelum, C., & Rabiu, M. M. (2009). Causes of blindness and visual impairment in Nigeria:
The Nigeria national blindness and visual impairment survey. Public Health, 123(1), 20–
27.
8. Lewallen, S., & Courtright, P. (2001). Blindness in Africa: Present situation and future
needs. British Journal of Ophthalmology, 85(8),-. Klein, B. E., Klein, R., & Linton, K. L. (1992). Prevalence of age-related lens opacities in
a population: The Beaver Dam Eye Study. Ophthalmology, 99(4),-. Taylor, H. R. (1999). Cataract: Epidemiology and prevention. American Journal of
Ophthalmology, 128(4), 467–473.
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