You may experience headache, dizziness, lightheadedness, fatigue, nausea, diarrhea, dry cough
or blurred vision as your body adjusts to the medication. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.
I have three different reading glasses of progressive strength. Sometimes the lower strength is sufficient, and at other times the stronger is needed!! I never considered it a serious problem, just part of the aging process.