What this map shows
At Sightsavers, our EGMs summarise, appraise, and present evidence from systematic or literature reviews.
The cataract EGM summarizes evidence from 80 reviews, of which six have been included twice as they report on two thematic areas (e.g. treatment as well as QCC). Of the 80 reviews, four are pediatric-related cataract reviews and 76 are age-related cataract reviews.
The reviews are unevenly distributed across the sectors, with most addressing treatment of cataract (30), closely followed by clinical care (22) and risk factors and prevention of cataract (18). Very little evidence is identified in terms of access to cataract-related health care services (7), economic evaluations of interventions (3), epidemiology (4) and quality of life (2). Therefore, this gap map shows that there are clear gaps in evidence at the health systems sector level. No reviews are identified for cataract-related screening and quality of non-clinical care.
A total of 37 reviews are of low confidence, of which 21 provide strong evidence in response to the research question they set out to answer. 22 reviews on the map are of medium quality, where the majority (15) show strong evidence in response to their research question. Finally, a total of 27 reviews are of low confidence; 11 of these provide strong evidence in response to their research question and another 11 provide weak evidence. Very few reviews provide inconclusive or weak evidence in response to author’s research question, regardless of confidence level.
A special thank you to Dr. Baixiang Xiao for supporting in the review of studies written in Chinese.