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Impact of Smartphone-Based Vision Testing on Eye Screening Uptake among University Students in Nigeria

Abstract

Visual impairment and uncorrected refractive errors remain important public health and educational concerns among university students, potentially affecting reading, academic performance, digital-device use, mobility, and overall quality of life. Many students may not undergo routine eye screening because of limited awareness, perceived lack of need, cost, inconvenience, long waiting times, and limited access to eye-care services. Smartphone-based vision testing provides an emerging digital approach that may allow individuals to conduct preliminary visual acuity assessments using mobile devices and subsequently receive recommendations for professional eye evaluation where abnormalities are identified. Given the widespread use of smartphones among university students, smartphone-based vision testing may provide a convenient and accessible approach to increasing participation in eye screening. Against this background, this study investigates the impact of smartphone-based vision testing on eye screening uptake among university students in Nigeria. The study will be anchored on the Technology Acceptance Model, Health Belief Model, and Health Systems Framework. The Technology Acceptance Model explains how perceived usefulness, perceived ease of use, convenience, trust, and perceived reliability of smartphone-based vision testing may influence students' willingness to use the technology. The Health Belief Model explains how perceived susceptibility to visual problems, perceived severity, perceived benefits of eye screening, perceived barriers, and cues to action may influence participation in eye-screening activities. The Health Systems Framework emphasizes service accessibility, health information, healthcare workforce, medical technologies, service delivery, referral systems, and continuity of care as important components of effective eye-health services. Collectively, these theoretical perspectives provide a suitable framework for explaining how smartphone-based vision testing may influence eye-screening uptake among university students in Nigeria. The study will adopt a quantitative quasi-experimental or analytical cross-sectional research design. The study population will comprise undergraduate and postgraduate students aged 18 years and above enrolled in selected public and private universities across Nigeria. A multistage sampling technique will be used to select geopolitical zones, states, universities, faculties or departments, and eligible students. Smartphone-based vision testing will be assessed using indicators such as availability of vision-testing applications or platforms, frequency of testing, ease of use, completion of visual acuity tests, time required for testing, accessibility, test instructions, result reporting, recommendations for professional eye examination, and student satisfaction with the technology. Eye-screening uptake will be assessed using indicators such as participation in vision screening, attendance at university or community eye-screening programmes, completion of visual acuity assessment, referral attendance, professional eye examination following abnormal smartphone results, and identification of previously undetected visual problems or refractive errors. Data will be collected using structured questionnaires, smartphone-based vision-testing records where available and appropriately consented, university health-service records, eye-screening registers, referral records, and professional eye-examination results where available. Descriptive statistics will be used to summarize participants' characteristics, smartphone use, vision-testing exposure, and eye-screening participation. Inferential statistical techniques, including chi-square tests, t-tests, correlation analysis, and logistic or multiple regression analysis where appropriate, will be used to determine the impact of smartphone-based vision testing on eye-screening uptake. Where a quasi-experimental design is adopted, eye-screening uptake before and after implementation of smartphone-based vision testing may be compared with that of a comparison group to determine changes associated with the intervention. Diagnostic tests will also be conducted to assess the reliability, validity, and robustness of the findings. The study is expected to find that smartphone-based vision testing has a significant positive impact on eye-screening uptake among university students in Nigeria. Students exposed to smartphone-based vision testing are expected to demonstrate greater participation in eye-screening activities than students without comparable access to the technology. The convenience and accessibility of smartphones may reduce some barriers associated with visiting eye-care facilities for preliminary assessment. Students who receive abnormal or potentially concerning results may be encouraged to seek comprehensive professional eye examinations and appropriate follow-up. Smartphone-based testing may also increase awareness of visual problems among students who do not routinely perceive a need for eye care. However, variations in smartphone screen size, viewing distance, lighting conditions, application quality, device calibration, test administration, digital literacy, and misunderstanding of screening results may affect accuracy and uptake. Smartphone-based vision testing should therefore be regarded as a preliminary screening approach rather than a replacement for comprehensive professional eye examinations. The study expects appropriately validated, user-friendly, and professionally supported smartphone-based vision testing to contribute significantly to improved eye-screening uptake among university students in Nigeria. The study is expected to contribute to the literature on smartphone-based health technologies, digital eye health, vision screening, refractive error detection, university student health, health technology adoption, preventive healthcare, and public health in Nigeria. The findings will provide useful information to the Federal Ministry of Health and Social Welfare, Federal Ministry of Education, National Universities Commission, ophthalmology and optometry services, university health centres, eye-care professionals, digital health developers, technology providers, development partners, and policymakers regarding the use of mobile technologies to improve access to eye-health services. The study will also provide evidence-based recommendations for integrating validated smartphone-based vision testing into university health programmes, strengthening referral pathways for students with abnormal screening results, training health personnel to support digital vision screening, improving awareness of routine eye examinations, and ensuring that smartphone-based screening technologies are appropriately validated and used alongside professional eye-care services across Nigerian universities.

Keywords: Smartphone-based vision testing, eye screening uptake, visual acuity, university students, digital eye health, refractive errors, vision screening, mobile health technology, eye health, Nigeria, public health.