Get your first pair of glasses free
First of all you should get your eye tested. Even if you eye vision is OK only an eye test can detect a problem that don't know you have.
If you notice that your eye sight vision is blurred, or your eyes are sensitive to light seek advice from an optometrist. There are many factors that can have an affect on your eye health, from the weather, working with a compute, and just every day tired eyes.
If you notice a change in your vision, probably you just need a good pair of reading glasses. The most popular companies are now offering you to pick your favorite pair of glasses and get your first pair free of cost