Glaucoma evidence gap map

What this map shows

At Sightsavers, our evidence gap maps (EGMs) summarise, appraise and present evidence from systematic or literature reviews.

The glaucoma EGM summarises evidence from 194 reviews. Most reviews (84) address treatment of glaucoma, followed by risk or prevention of the condition (38). Of the remainder, 27 explore screening/early detection, 18 examine quality of health care services, 15 investigate epidemiology, six cover quality of life, five analyse cost-benefit/economic aspects, and one assesses the role of technology.

The map highlights notable gaps at the health systems level: no reviews were identified on access to glaucoma services, and technology remains markedly under-researched.

Regarding the strength of evidence, 132 reviews provide strong answers to their research questions, 34 are inconclusive, and 28 are weak. In methodological terms, 97 reviews are graded low quality, 62 medium quality, and 35 high quality.