Yes, though uncommon, HCQS can affect vision especially if taken at higher doses or for a period of time (> 5 years). The symptoms include reading or seeing difficulties (words, letters, or parts of objects missing), sensitivity to light, blurred distant vision, and seeing light flashes or streaks. If you notice any of these symptoms, consult your doctor immediately. Your doctor may carry out various eye tests and then decide if Hydrocad 200mg Tablet needs to be discontinued. You may also be advised to get certain eye tests done periodically if you have been prescribed HCQS.