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Non-Contact Tonometry
This test helps diagnose glaucoma. The doctor will use a tool called a tonometer that blows a tiny puff of air, measuring eye pressure indirectly by the eye’s resistance to the puff.
Applanation instruments can also measure pressure. They are the most accurate, but you’ll need local anesthetic.
Retinal Tomography
This computerized test can give a remarkably detailed image of the retina and all of its layers. You might get it if you have a serious retina condition, like age-related macular degeneration or retinal detachment.
Ultrasound
This test uses sound waves to make a picture of the inside of your eye. It helps your doctor diagnose and treat tumors, cataracts, or bleeding in your eye. You might also get it before cataract surgery.
Visual Acuity Testing
This measures how well you see at near and far distances. If your child can’t yet read, the doctor will use a special test. Your child will look at a letter “E” then tell the doctor the way the legs point with their fingers. You can practice this at home before the test.
Visual Field Test
This measures your peripheral (side) vision. You’ll stare at an object in the center of your line of vision (like the doctor’s eyes or a computer screen). As you look at the target, you’ll note when you see an object moving into your field of vision or, depending on the test, when the lighted spot appears. This test lets the doctor know if conditions like stroke or glaucoma have hurt your vision.