Changes in vision are not always dramatic. You may notice that signs look less sharp, reading takes more effort, or you find yourself squinting or moving objects to a different distance. Headaches or eye fatigue can also occur, but these symptoms have many possible causes and do not prove that your prescription is wrong. A professional eye exam can determine whether a prescription change, frame adjustment, or another explanation is involved.
Glasses can also become uncomfortable or less effective because the frame has shifted, nose pads are worn, or lenses are scratched or damaged. A poorly fitting frame may sit unevenly and affect how you look through the lenses. An optician may be able to adjust the frame, but damaged lenses should be assessed rather than repaired with household products. Keep glasses in a case and clean them with suitable materials to reduce avoidable wear.
Arrange an exam if your vision changes, your glasses no longer meet the demands of work or daily tasks, or your prescription is due for review. Bring the glasses you use most often and explain which activities are difficult. Seek urgent care for sudden vision loss, significant eye pain, new flashes or many floaters, or an eye injury. Do not borrow another person’s glasses or keep using a damaged pair if they interfere with safe vision.