Of the five senses, sight and sound are the most important for learning. While all senses are important, many people particularly fear the loss of eyesight. Boyers and colleagues sought to determine if scientific effort is an accurate reflection of the global burden of eye and vision disease.
Their detailed examination of the Cochrane Database of Systematic Reviews found gaps in the literature. Age-related diseases (cataract, glaucoma and macular degeneration) received the most attention,