Please choose the correct ending to complete the given sentence: Health: [header] How to exercise your eyes [title] Talk to your optometrist about eye exercises. [step] There is no clear scientific data that shows eye exercises improve your eyesight. So before you attempt eye exercises, it's a good idea to get a professional eye exam done by your optometrist.

Ending1: You might find that your general optometrist has questions about your eye which you may have to ask yourself to see if this is a functional problem. [substeps] Ask your eye specialist, your psychiatrist, your pharmacist or other medical professional who may be doing a better job of assessing your eyesight. Ending2: Your optometrist can then tell you if you have any existing eye problems or issues. Before you try eye exercises, you should ask your optometrist if these exercises would benefit your particular set of eyes. Ending3: [substeps] Ask whether you should think about wearing glasses whenever you practice intense eye exercise. Your optometrist might recommend contact lenses to improve vision. Ending4: Make sure that you use eye exercises that are over 200 repetitions of a certain task for you to get the best results. The more repetitions you perform, the more likely it is that you'll eventually develop vision problems in your eyes.

Answer format: ending1/ending2/ending3/ending4