Iysetra Eye Drop is intended for external use only Follow the prescribed dose and duration recommended by your doctor If you wear contact lenses make sure to remove them before applying the medication To prevent contamination of the eye drop avoid touching the tip of the dropper to any surface For optimal results it is advised to use the eye drop daily in the evening or at night Some common side effects may include a burning sensation itching or temporary blurring of the eyes If these side effects persist or worsen notify your doctor In case these side effects persist for an extended period please inform your doctor It is important to exercise caution while driving after using this eye drop if your eyes have difficulty concentrating and reacting