<prompt> Posterior polymorphous dystrophy -Causes corectopiaIs inherited in an autosomal recessive fashionCauses blindness in over 90 of sufferersCan be trated with lamellar corneal grafts  <response>: It is a dominantly inherited dystrophy of endothelium and Descemets membrane. It is characterised by lesions with variable appearance, such as vesicles, curvilinear lines or geographical opacities at the level of Descemets membrane. The condition is very slowly progressive and thus usually asymptomatic. Corneal oedema sometimes may occur, requiring keratoplasty. Rarely it may be complicated by secondary glaucoma.Reference:Comprehensive ophthalmology,AK Khurana,4th edition,page no.119 