The lifetime risk in normal eyes is about 1 in 300. ![]() Detachment is more frequent in the middle-aged or elderly population with rates of around 20 in 100,000 per year. The risk of retinal detachment in otherwise normal eyes is around 5 in 100,000 per year. Prevalence of rhegmatogenous retinal detachment A retrospective Indian study of more than 500 cases of rhegmatogenous detachments found that 11% were due to trauma, and that gradual onset was the norm, with over 50% presenting more than one month after the inciting injury. Ī small number of retinal detachments result from trauma, including blunt blows to the orbit, penetrating trauma, and concussions to the head.
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