Blindness marks the failure or inefficacy of ophthalmological treatment. Once a patient becomes permanently blind, he or she may be lost from the care of the ophthalmologist. This means that the ophthalmologist may not have personal experience of the size of the problem and may not be in a position to experience the relative incidences of different causes of blindness. The keeping of accurate statistics is of great importance, and in order to keep statistical records it is necessary to have a clear definition of blindness. Many people who dread blindness imagine having no perception of light in each eye. Fortunately this situation is uncommon, but many people are severely debilitated by visual loss.
KeywordsEurope Income Retina Glaucoma Cataract
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