A prospective study screening for visual impairment in a day centre for people with a mental handicap showed that 30% required spectacles or registration as blind or partially-sighted and a further 20% had previously unknown pathology. Carers were not reliable in identifying visual problems in their charges, and routine screening should be encouraged. High Street optometrists should be able to measure visual acuity in the individuals in this sample excluding those cared for in special care units for whom screening may be less beneficial.
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