Village Integrated Eye Workers Trial

Corneal ulceration is a leading cause of visual impairment globally, with a disproportionate burden in developing countries. Corneal opacity after ulceration is responsible for a significant proportion of blinding eye disease in Africa and Asia. While antimicrobial treatment is generally effective in eradicating infection, "successful" treatment is often associated with a poor visual outcome. The scarring that accompanies the resolution of infection leaves many eyes blind. It has been difficult to discern differences between different antimicrobials in a randomized controlled trial (RCT). In fact, only a single RCT with more than 50 subjects has found any significant difference between ulcer treatments. Thus, prevention of corneal ulceration may be our best opportunity to reduce morbidity associated with corneal ulceration.

Several non-randomized prevention studies in Nepal, Myanmar, and Bhutan have suggested that antibiotic ointment applied promptly after a corneal abrasion could dramatically lower the incidence of ulcers, relative to neighboring or historic controls. In Madurai, South India, a clinical trial demonstrated that abrasions randomized to topical antibacterial and antifungal prophylaxis were not significantly less likely to develop fungal ulcers than those randomized to antibacterial ointment alone, even though the region had a high incidence of fungal infection. This same trial also found that the incidence of ulcers in villages outside the prophylaxis program was far higher; these control villages were neighboring but not randomized, and it is possible that they were in some way different from the villages included in the program.

VIEW was designed to determine whether we can prevent corneal ulcers on a large scale. VIEW is a community-randomized trial comparing villages randomized to receive an intervention consisting of a trained community health volunteer providing antimicrobial ointment after a corneal abrasion to control villages receiving no additional intervention. The primary outcome of corneal ulcer will be measured by baseline and annual population-based census performed in both intervention and control villages by masked examiners from baseline to 36 months. The examiners will photograph corneas of all residents who are suspected of having a corneal ulcer, with photographs later read by masked examiners. Each resident in the village will be examined for evidence of a corneal opacity and asked about their ocular history. In villages randomized to intervention, the trained community health volunteers will actively promote their services through regular meetings with local women's groups by encouraging residents to notify the village eye health worker within 24 hours of ocular trauma. In control villages, abrasions and ulcers will be treated if they present to a clinic or are found during the annual monitoring visits, but active promotion of corneal abrasion care will not be offered.