Why vision tests matter as you get older

A vision test is not just about whether you need new glasses. For seniors, it can catch diseases that steal sight without warning—glaucoma, macular degeneration, diabetic retinopathy, cataracts. Many of these cause no pain and no symptoms until damage is already done. A standard eye exam catches them early, when treatment works best.

You should have your eyes tested at least every one to two years, or more often if you have diabetes, high blood pressure, or a family history of eye disease. If you notice blurred vision, floaters, flashing lights, or loss of side vision, do not wait for a scheduled exam—contact your eye doctor right away.

Key Takeaways

  • A comprehensive eye exam takes 30 to 60 minutes and tests far more than whether you need glasses—it checks for glaucoma, macular degeneration, cataracts, and other diseases.
  • You can see an optometrist or an ophthalmologist; both perform full exams, but only an ophthalmologist is a medical doctor who can perform eye surgery.
  • Medicare covers one eye exam every 24 months for most seniors, and more often if you have diabetes or glaucoma.
  • Bring your insurance card, a list of current medications, and your glasses or contacts if you wear them.
  • If cost is a concern, community health centers and vision nonprofits offer reduced-cost exams based on income.

What happens during a standard eye exam

An eye exam has several parts. You will read letters on a chart to test how clearly you see at different distances. The doctor will shine lights in your eyes and ask you to follow a moving object to check how your eyes move together. You may look through a machine called a phoropter that shows you different lens strengths to find your current prescription.

The doctor will measure the pressure inside your eye—this screens for glaucoma. They will dilate your pupils with drops so they can see the back of your eye, including the retina and optic nerve. This dilation takes about 20 minutes to wear off, and your vision will be blurry and you will be sensitive to light during that time. Plan to bring sunglasses or have someone drive you home if the glare bothers you.

Some offices use optical coherence tomography (OCT), a camera that takes detailed pictures of the layers of your eye without touching it. This is especially useful for detecting early macular degeneration. The whole visit usually lasts 30 to 60 minutes.

Optometrist versus ophthalmologist

An optometrist has a doctoral degree in optometry and can perform a full eye exam, write prescriptions for glasses and contacts, and diagnose common eye diseases. They cannot perform surgery or inject medications into the eye. Most routine exams and glasses prescriptions come from optometrists.

An ophthalmologist is a medical doctor (MD or DO) who specializes in eye care. They can do everything an optometrist does, plus perform cataract surgery, LASIK, retinal surgery, and other procedures. They also manage complex eye diseases. If you have glaucoma, macular degeneration, or diabetic eye disease, your primary eye doctor may be an ophthalmologist, or you may see one as a specialist.

For a routine exam and new glasses, either is fine. Ask your primary care doctor for a referral if you are not sure where to start, or call your insurance to find in-network providers near you.

What Medicare covers for eye exams

Medicare Part B covers one comprehensive eye exam every 24 months for beneficiaries without diabetes or glaucoma. If you have diabetes, you get one exam per year. If you have glaucoma, Medicare covers one exam per year plus any follow-up visits your doctor orders.

Medicare does not cover routine glasses or contacts, but it does cover one pair of glasses or contact lenses after cataract surgery. If you need glasses for other reasons, you pay out of pocket, though many optometrists and eyeglass retailers offer discounts for seniors.

You will pay 20 percent of the Medicare-approved amount for the exam after you meet your Part B deductible. The exact cost depends on what tests the doctor performs and whether they are in-network. Call ahead and ask what your out-of-pocket cost will be.

Finding an eye doctor and scheduling an exam

Start by asking your primary care doctor for a referral. If you do not have one, call your insurance company and ask for in-network eye doctors near you. You can also search the American Optometric Association website (aoa.org) or the American Academy of Ophthalmology website (aao.org) to find doctors by location and specialty.

When you call to schedule, tell the office staff that you need a comprehensive eye exam and that you have Medicare or other insurance. Ask whether the doctor is in-network and what your out-of-pocket cost will be. If you have not had an exam in several years, mention that so the office can block extra time.

Bring your insurance card, a photo ID, and a list of all medications you take—some drugs affect your eyes or can interact with dilating drops. If you wear glasses or contacts, bring them so the doctor can check your current prescription. Arrive 10 to 15 minutes early to fill out a health history form.

Low-cost and free vision exams

If you do not have insurance or cannot afford the out-of-pocket cost, community health centers often offer eye exams on a sliding fee scale based on your income. Search for a center near you at findahealthcenter.hrsa.gov.

Some nonprofits also offer free or reduced-cost exams. The Lions Club runs vision screening programs in many communities. Prevent Blindness (preventblindness.org) and the American Foundation for the Blind (afb.org) both maintain lists of local resources. Some optometry schools offer exams at reduced cost performed by students under supervision.

If you may have access to for Medicaid in your state, it may cover eye exams and glasses. Call your state Medicaid office to ask what is covered.

What to do if you get bad news

If your eye doctor finds glaucoma, macular degeneration, cataracts, or diabetic retinopathy, ask them to explain what it means, how fast it is likely to progress, and what treatment or monitoring you need. Ask whether you should see a specialist. Write down the name of any condition and ask for printed information you can take home and read.

Many eye diseases progress slowly and can be managed with drops, laser treatment, or surgery to preserve your vision. The key is catching them early and following your doctor's treatment plan. If you are prescribed eye drops, ask the doctor or pharmacist to show you how to use them correctly—many people do not instill them properly, which reduces how well they work.

If cost of treatment is a concern, ask your doctor about generic versions of eye drops or whether there are patient information programs from the drug manufacturer. Some nonprofits also help seniors pay for eye care.

Frequently Asked Questions

How often should I have my eyes tested?

Medicare covers one exam every 24 months for most seniors, and annually if you have diabetes or glaucoma. If you have symptoms like blurred vision, floaters, or flashing lights, see your eye doctor right away rather than waiting for your next scheduled exam. Your doctor may recommend more frequent exams if you have certain eye conditions.

Will my pupils stay dilated after the exam?

Dilation usually lasts 4 to 6 hours, though it can last longer in people with light-colored eyes. Your vision will be blurry and you will be sensitive to bright light. Wear sunglasses on the way home and avoid driving if the glare is too uncomfortable. Ask the office staff how long they expect dilation to last before you leave.

What if I cannot afford glasses after my exam?

Many optometrists and eyeglass retailers offer discounts for seniors. Some community health centers and nonprofits also help pay for glasses. Ask your eye doctor whether they know of local programs. If you have Medicaid, it may cover glasses in your state.

Can I get an eye exam without insurance?

Yes. Community health centers offer exams on a sliding fee scale based on income. The Lions Club, Prevent Blindness, and the American Foundation for the Blind all maintain lists of free or reduced-cost vision programs by location. Optometry schools also perform exams at reduced cost.

What should I bring to my eye exam?

Bring your insurance card, photo ID, and a list of all medications you take. If you wear glasses or contacts, bring them so the doctor can check your current prescription. Arrive early to fill out a health history form. If you plan to have your pupils dilated, arrange for someone to drive you home or plan to take a taxi.