<prompt> Other than cataract, which one among the following is the highest prevalent cause of blindness in the world -Corneal opacityDiabetic retinopathyGlaucomaTrachoma  <response>: Cataract 39 Glaucoma 10 tracoma3 diabeticretinopathy 4 Ref-Park;s textbook of Preventive and social medicine 23rd edition. . 