Cyclofez eye drops are commonly used before an eye test to relax the eye muscles and help get accurate results, and they are generally safe when used as advised by the doctor. You may notice temporary effects like blurred vision, light sensitivity, or mild irritation, which usually settle on their own. Make sure to follow the exact dosing schedule and avoid touching the dropper to the eye. If your child has severe redness, pain, or unusual behaviour after using it, talk to your doctor for proper medical advice.