Barriers and Facilitators to Paediatric Eye Care Access in Sub-Saharan Africa: A Scoping Review

1. Background and Rationale Childhood visual impairment and blindness constitute one of the most pressing yet under-addressed public health challenges globally. Sub-Saharan Africa (SSA) carries a disproportionate share of this burden, with approximately 1.4 million children blind worldwide and the African region consistently reporting the highest prevalence of childhood blindness. This elevated burden reflects a convergence of factors: a high prevalence of treatable eye conditions, fragile and under-resourced health systems, a large and rapidly growing paediatric population, and persistent inequities in access to care. The spectrum of paediatric eye disease in SSA is broad. Refractive errors remain the leading cause of visual impairment in school-age children, with documented adverse effects on educational attainment and long-term economic productivity. Amblyopia demands timely detection within critical developmental windows to prevent irreversible vision loss. Congenital cataract, though largely treatable, requires prompt surgical intervention and appropriate optical rehabilitation. Retinopathy of prematurity (ROP) is an emerging concern as neonatal survival improves across the region without a corresponding expansion of screening and treatment capacity. Infectious conditions such as trachoma, vitamin A deficiency, and ophthalmia neonatorum continue to affect children across SSA, while ocular trauma contributes substantially to preventable visual morbidity. Critically, effective treatments exist for the majority of causes of paediatric visual impairment. The principal challenge is not scientific uncertainty but access: the persistent, system-wide failure to connect children who need eye care with the services that can help them. Children identified through screening frequently fail to complete referral, receive prescribed spectacles, or attend for surgery. This gap between clinical possibility and actual care received is an access problem, and its dimensions are insufficiently understood. Two prior narrative reviews have addressed barriers to paediatric eye care in African countries. However, both are limited by broad geographic scope that conflates SSA with North African contexts, informal search strategies yielding very small included study sets, absence of structured synthesis by care pathway stage or SSA sub-region, omission of facilitators, and failure to capture post-2020 literature. The present review is designed to address each of these limitations directly, providing a more rigorous, comprehensive, and actionable synthesis of the evidence. 2. Purpose and Research Question This scoping review addresses a single, focused research question: What barriers and facilitators — at the individual, health system, and structural levels — have been reported in relation to paediatric eye care access in Sub-Saharan Africa, across the care pathway from identification through to treatment and follow-up? The aim is to comprehensively map the existing evidence landscape rather than to answer a narrow clinical question or synthesise effect estimates. Identifying where evidence is absent is as important as summarising what is known: such mapping can directly inform future primary research, targeted systematic reviews, and resource allocation decisions. 3. Study Objectives The review pursues five inter-related objectives: • To identify and map all empirical evidence on barriers and facilitators to paediatric eye care access reported from Sub-Saharan African settings since 2000. • To synthesise barriers and facilitators across three levels — demand-side/individual, supply-side/health system, and structural/contextual — and across four care pathway stages: identification, referral, treatment, and follow-up. • To examine the distribution of evidence by eye condition (refractive error, amblyopia, cataract, ROP, trachoma, trauma, and others), SSA sub-region, and age group, thereby identifying where evidence is concentrated and where critical gaps exist. • To catalogue interventions or programme strategies that have been tested or proposed to address identified barriers, summarising available evidence on their effectiveness. • To generate a structured evidence map and identify priority areas for future primary research, systematic review, and policy or programme investment. 4. Context and Significance Achieving good visual outcomes in children requires a functional care pathway spanning multiple stages: awareness and early detection, screening (school-based, facility-based, or community-driven), referral to appropriate services, timely intervention (whether spectacles, surgery, or medical therapy), and sustained follow-up. Each component of this pathway faces distinct challenges in SSA contexts. 4.1 Health System Constraints Health systems in SSA frequently contend with limited infrastructure, chronic workforce shortages in ophthalmology and optometry, inadequate availability of equipment and consumables, and insufficient and fragmented financing. These supply-side deficiencies mean that even children who are motivated to seek care encounter services that are under-equipped to provide it. 4.2 Geographic and Economic Barriers Geographic barriers are pervasive: the distance to specialised eye care services, transportation costs, and pronounced rural-urban disparities together prevent large proportions of affected children from accessing care. Economic barriers arise from out-of-pocket costs at multiple stages, which are often prohibitive for the households most in need. 4.3 Social and Cultural Factors Low awareness of childhood eye conditions, limited understanding of the consequences of untreated visual impairment, beliefs about the causes and appropriate management of eye disease, and gender disparities in care-seeking behaviour all shape whether and when families pursue paediatric eye care. These demand-side factors are as important as supply-side constraints in determining care outcomes. 4.4 Programmatic and Structural Gaps Many SSA settings lack integrated paediatric eye health screening programmes, have weak or broken referral mechanisms, and maintain limited data systems for monitoring service delivery and outcomes. National policies specific to paediatric eye health are absent in many countries, and eye care is often inadequately integrated into school health or primary care platforms. Understanding these barriers in depth — and equally understanding what facilitators enable access — is a prerequisite for designing effective, context-sensitive programmes and policies. This review directly addresses that need. 5. Methodology 5.1 Study Design A scoping review methodology is employed, following the methodological framework of Arksey and O'Malley (2005), refined by Levac et al. (2010) and the Joanna Briggs Institute (Peters et al., 2020). Reporting follows the PRISMA Extension for Scoping Reviews (PRISMA-ScR). The scoping approach is selected because: the topic spans multiple eye conditions, diverse study designs, varied outcome measures, and heterogeneous settings; the primary aim is to map the evidence landscape rather than synthesise effect estimates; and identifying gaps in evidence is as central as summarising what exists. 5.2 Eligibility Criteria Eligibility criteria are defined using the Population-Concept-Context (PCC) framework. The population encompasses children and adolescents aged 0-18 years, with caregivers or healthcare providers eligible where their data illuminate barriers to service delivery. Studies with mixed age ranges are included when paediatric data can be extracted separately or children comprise more than 50% of participants. The concept of interest is any empirical data on barriers or facilitators to accessing, receiving, or completing paediatric eye care, including referral completion, spectacle collection, treatment uptake, and follow-up. These may be primary findings or secondary observations within broader studies. All eye conditions are in scope. Studies reporting only on disease burden or service delivery models, with no barrier or facilitator data, are excluded. The context is Sub-Saharan Africa, defined as all African countries south of the Sahara Desert, encompassing Eastern, Western, Central, and Southern Africa. Both peer-reviewed literature and grey literature with empirical data are eligible. Studies published from 2000 onwards are included, with no language restrictions. 5.3 Information Sources and Search Strategy Searches will be conducted across ten major biomedical and global health databases, including MEDLINE, Embase, Scopus, Web of Science, Global Health (CABI), CINAHL, the Cochrane Library, LILACS, African Index Medicus, and IMSEAR. Grey literature will be identified through international organisations (WHO, UNICEF, IAPB, Sightsavers, CBM Global, Orbis International), thesis repositories, conference proceedings from ARVO, AAPOS, and ICO, and targeted Google Scholar searches. Search strategies are developed with an experienced health sciences librarian using controlled vocabulary (MeSH/Emtree) and free-text terms, combined using Boolean operators across four concept blocks: population (children/adolescents), condition (eye health), concept (barriers/facilitators/access), and setting (Sub-Saharan Africa). Reference lists of all included studies and identified systematic reviews are hand-searched. Forward citation searching is performed for key included studies. 5.4 Study Selection Records are imported into Rayyan for deduplication and screening. All reviewers complete a calibration exercise on 50 records prior to independent screening. Two reviewers independently screen titles and abstracts applying a liberal inclusion rule (Level 1), followed by independent full-text review against all eligibility criteria (Level 2). The decisive criterion at Level 2 is the presence of empirical data on barriers or facilitators. Discrepancies are resolved through discussion, with third-reviewer adjudication where needed. Inter-rater agreement is assessed using Cohen's kappa, targeting κ ≥ 0.70 at both stages. 5.5 Data Extraction and Synthesis Data extraction uses a standardised, pilot-tested form with two modules: a common core module capturing study characteristics, and a barriers and facilitators module capturing every reported barrier and facilitator categorised by level (demand-side, supply-side, or structural) and by care pathway stage (identification, referral, treatment, follow-up). Ten percent of studies undergo dual extraction. Synthesis is both quantitative (numerical summaries, evidence charting matrix) and qualitative (thematic analysis within and across the three-level framework). The evidence charting matrix maps all included studies across conditions, sub-regions, age groups, and care pathway stages, enabling visual identification of evidence concentrations and gaps. Interventions to address barriers are catalogued separately. Quality appraisal is not conducted, consistent with scoping review guidance, with rigour assured through transparent reporting, dual screening, pilot testing, and inter-rater reliability assessment. 6. Expected Outcomes This scoping review is expected to produce the following outputs and contributions: 6.1 Primary Publication A peer-reviewed, open-access manuscript will be submitted to a high-impact journal (target journals include BMJ Open, BMC Ophthalmology, PLOS Global Public Health, and Ophthalmic Epidemiology), prepared in accordance with PRISMA-ScR guidelines. This manuscript will constitute the most comprehensive and methodologically rigorous synthesis to date of barriers and facilitators to paediatric eye care access across Sub-Saharan Africa. 6.2 Structured Evidence Map An evidence charting matrix — to be made available as open supplementary data via the Open Science Framework — will map the distribution of evidence across eye conditions, SSA sub-regions, age groups, and care pathway stages. This map will serve as a practical reference tool for researchers, programme designers, and funders seeking to identify where evidence is available and where it is lacking. 6.3 Synthesis of Barriers and Facilitators The review will produce a structured, multi-level synthesis of barriers and facilitators, organised by: (i) level of operation (individual/demand-side, health system/supply-side, structural/contextual); (ii) care pathway stage (identification, referral, treatment, follow-up); and (iii) eye condition where data allow. This granular synthesis will enable programme designers to identify the specific barriers most relevant to their disease focus, target population, and setting, and to select or design facilitators accordingly. 6.4 Intervention Catalogue The review will catalogue all interventions or programme strategies reported in the included literature to address barriers to paediatric eye care access, together with available evidence on their implementation and outcomes. This catalogue is intended to support evidence-informed programme design and to highlight where intervention research is most urgently needed. 6.5 Identification of Evidence Gaps A dedicated section of the manuscript will document gaps in the evidence base: conditions, SSA sub-regions, age groups, and care pathway stages where barrier and facilitator data are absent or sparse. These documented gaps will constitute a concrete agenda for future primary research and targeted systematic reviews. 6.6 Policy and Programme Implications Findings will be disseminated through stakeholder briefings directed at organisations engaged in paediatric eye health policy and programming in SSA, including WHO AFRO, IAPB Africa, national ministries of health, and regional eye health NGOs. Plain-language summaries will be shared through professional networks. The review thus aims not only to contribute to the academic literature but to directly inform the decisions of those designing, funding, and implementing paediatric eye health programmes across the region.