Cataract remains the leading cause of avoidable blindness in India despite substantial expansion of surgical services over the past two decades. While surgical coverage has improved, optimal visual outcomes depend on effective post-operative follow-up, which remains inconsistent across decentralized Vision Center-based systems, particularly in rural and semi-urban settings. Routine program data show wide variation in post-operative cataract follow-up compliance among Vision Centers operating within similar organizational and geographic contexts, suggesting the influence of facility-level determinants.

This phased mixed-methods implementation study aims to identify facility-level factors influencing post-operative cataract follow-up compliance and to develop an evidence-based framework to strengthen follow-up systems. Phase 1 will involve retrospective analysis of three years of integrated Health Management Information System- Vision Centre Management Information System (HMIS-VCMIS) data from approximately 120 Vision Centers to establish empirical benchmarks and classify centers as high- or low-performing. Structured facility assessments and qualitative interviews with Vision Center staff, program managers, and post-operative patients will be conducted to identify operational practices, workflows, and contextual factors associated with follow-up performance.

Phase 2 will focus on co-design, pilot testing, and early implementation of a Follow-Up Strengthening Intervention Framework in selected low-performing Vision Centers. The intervention will include standardized counselling workflows, follow-up tracking and reminder systems, role clarification, supervisory feedback mechanisms, and peer-learning support from high-performing centers. Changes in follow-up compliance will be monitored using routine data over a 12-month implementation period, alongside process evaluation to assess feasibility, fidelity, and acceptability.

Findings from this study will generate practical evidence to strengthen post-operative cataract follow-up systems and inform scalable quality improvement strategies within decentralized Vision Center networks.

Cataract remains the leading cause of avoidable blindness in India, accounting for nearly two-thirds of blindness among adults aged 50 years and older. Over the past two decades, the expansion of cataract surgical services through public-private partnerships, outreach programs, and high-volume surgical models has significantly improved surgical coverage and access to care. However, increasing surgical coverage alone is insufficient to ensure optimal visual outcomes unless it is supported by effective post-operative follow-up care.

Post-operative cataract follow-up is a complex service delivery function that requires coordinated action between surgical hospitals, Vision Centers, and community-based systems. It is essential for early detection and management of complications, monitoring visual recovery, providing refractive correction, reinforcing post-surgical counselling, and accurately assessing surgical outcomes. Poor follow-up compliance can result in avoidable visual impairment, delayed treatment of complications, reduced patient satisfaction, and inaccurate assessment of surgical quality, thereby undermining the overall effectiveness of cataract programs.

Vision Centers (VCs) serve as decentralized eye care facilities providing continuity of care following cataract surgery, particularly in rural and semi-urban settings. By reducing travel distance, direct costs, and opportunity losses for patients, Vision Centers are intended to facilitate timely post-operative follow-up closer to patients' homes. Although often categorized as primary eye care facilities, in the context of cataract services they function as task-shifted platforms for post-operative follow-up and referral, linking secondary surgical care with community-level access.

Despite this decentralized model, routine program data indicate wide variation in post-operative follow-up compliance across Vision Centers. Some centers consistently achieve compliance rates exceeding 80%, while others remain below 60%, even within similar organizational, geographic, and programmatic contexts. This variability suggests that follow-up compliance is influenced not only by patient-level factors but also by facility-level and system-level determinants, including staffing patterns, counselling workflows, follow-up tracking mechanisms, documentation practices, community engagement strategies, and managerial or sponsor support. These facility-level determinants have not yet been systematically examined using an implementation-focused and evidence-based approach.

Definition of High- and Low-Performing Vision Centers

For the purpose of this study, Vision Centers will be categorized based on pooled three-year post-operative cataract follow-up compliance and consistency of performance over time:

• High-Performing Vision Centers: Vision Centers achieving ≥80% post-operative follow-up compliance, consistently across at least two of the preceding three years.
• Low-Performing Vision Centers: Vision Centers achieving ≤60% post-operative follow-up compliance, with persistently low performance across the same period.

Rationale Routine data from integrated Hospital Management Information Systems (HMIS) and Vision Center Management Information Systems (VCMIS) demonstrate persistent differences in post-operative cataract follow-up compliance across Vision Centers. The coexistence of high- and low-performing Vision Centers serving comparable populations within the same service delivery system provides an opportunity to identify modifiable facility-level determinants influencing follow-up adherence.

As cataract programs progressed, the primary challenge has shifted from increasing surgical volume to ensuring quality assurance and continuity of care. Post-operative follow-up remains a critical yet weakly institutionalized component of routine cataract service delivery. Facility-level practices influencing follow-up performance are poorly documented, insufficiently standardized, and inconsistently monitored. Addressing these gaps is essential to protect surgical outcomes and optimize returns on investment in cataract surgery programs.

Establishing empirical benchmarks based on high-performing Vision Centers and analytically identifying facilitators and barriers differentiating them from low-performing centers is therefore essential. A phased mixed-methods implementation research approach, linking retrospective analysis of routine data, structured facility assessments, and qualitative stakeholder inquiry, will allow a comprehensive examination of both quantitative performance patterns and the contextual factors shaping them.

Study Objectives Overall Objective To generate an evidence-based framework for strengthening post-operative cataract follow-up compliance within decentralized Vision Center-based follow-up systems in rural and semi-urban India.

Phase 1: Assessment (Months 0-8) Primary Objective 1 To determine an empirical benchmark for post-operative cataract follow-up compliance by analyzing retrospective data from high-performing Vision Centers over the preceding three years.

Primary Objective 2 To identify and compare facility-level facilitators and operational characteristics associated with high and low post-operative follow-up compliance through structured Vision Center assessments.

Secondary Objective To explore stakeholder perceptions, workflows, leadership practices, and contextual factors influencing post-operative follow-up adherence through qualitative interviews at high- and low-performing Vision Centers.

Phase 2: Intervention Design and Early Implementation (Months 9-26)

Phase 2 will involve:

1. Co-design of a Follow-Up Strengthening Intervention Framework informed by Phase 1 findings and high-performing Vision Center practices.
2. Pilot testing of the intervention in one or two low-performing Vision Centers for three months.
3. Early implementation and evaluation of the refined intervention in selected low-performing Vision Centers over 12 months, using routine monitoring and structured process evaluation.

Conditions Conditions: Cataract (Post-operative Cataract Surgery Follow-up)

Keywords:

Cataract surgery, Community-based eye care, Continuity of care, Decentralized eye care, Facility-level determinants, Follow-up compliance, Mixed-methods study, Post-operative cataract care, Quality of care, Vision Centers

Study Design:

This is a phased mixed-methods study, comprising a retrospective observational study in Phase 1 and an intervention with early implementation in Phase 2.

Study Type:

Observational study with mixed-methods design focusing on implementation research and quality improvement at the facility level.

Primary Purpose:

To determine an empirical benchmark for post-operative cataract follow-up compliance and design and implement an evidence-based interventions aimed at strengthening post-operative follow-up systems at the vision centres.

Study Phase:

The study will be conducted in two sequential phases:

• Phase 1-Assessment Phase: This phase involves retrospective analysis of routinely collected HMIS-VCMIS data and facility-level and qualitative assessments to establish baseline follow-up compliance rates, determine empirical benchmarks from high-performing Vision Centers, and identify key facilitators and barriers influencing follow-up compliance.

• Phase 2 - Intervention and Early Implementation Phase: Based on findings from Phase 1, this phase will focus on the design and early implementation of evidence-based interventions aimed at strengthening post-operative follow-up systems. The interventions will primarily target low-performing Vision Centers to improve follow-up compliance, while sustaining and enhancing performance in high-performing Vision Centers.

Inclusion Criteria:

• Age ≥40 years
• All cataract surgery types (e.g., SICS, phacoemulsification)
• Advised Vision Center follow-up at discharge
• Complete HMIS-VCMIS linkage

Exclusion Criteria:

• Age <40 years
• Non-cataract surgeries
• No advised Vision Center follow-up