Your visual acuityA "Tumbling E" eye chart from the 1950s. The chart has capital E's facing in different directions, so people being tested can indicate which direction the letter is pointing, instead of having to read different letters.

This is the part of an eye exam people are most familiar with. You will read an eye chart to determine how well you see at various distances. You cover one eye while the other is being tested. This exam will determine whether you have 20/20 vision or not.

Your prescription for corrective lenses

Your doctor will ask you to look at an eye chart through a device called a phoroptor. The phoroptor contains different lenses. It will help determine the best eyeglass or contact lens prescription for you.

Your pupils

Your doctor may check how your pupils respond to light by shining a bright beam of light into your eye. Pupils usually respond by getting smaller. If your pupils widen or don’t respond, this may reveal an underlying problem.

Your side vision

Loss of side vision (peripheral vision) may be a symptom of glaucoma. This test can find eye problems you aren’t aware of because you can lose side vision without noticing.

Your eye movement

A test called ocular motility evaluates the movement of your eyes. Your ophthalmologist looks to see if your eyes are aligned. They also check that your eye muscles are working properly.