Many sight-threatening diseases if detected early can be cured or treated to prevent or slow the progression of serious vision loss. The most important step in preventing visual loss is by routine examination of eyes by a qualified eye care professional. Children should receive their first comprehensive eye examination before the age of four unless problems warrant an earlier examination. Persons of age group 20 to 40 should have an eye examination every five years, 40 to 60 every two years and after 60 every year if there are no visual problems. Immediate care is required if there is visual change, pain, flashes of light, new floaters, injury or tearing etc. Persons with diabetes are at greater risk for several eye disorders including diabetic retinopathy, glaucoma, and cataract, and should have an eye examination every year or as per their doctor’s advice.