What to Expect at Your Eye Doctor Appointment

What happens during a routine eye exam

An eye doctor appointment usually lasts 30 to 60 minutes and involves a series of tests to check your vision and eye health. You'll start in the waiting room with paperwork about your medical history and any vision problems you've noticed. Then a technician will run preliminary tests — measuring your eye pressure, taking photos of your retina, or checking how well each eye focuses. After that, the eye doctor (either an optometrist or ophthalmologist) will do a refraction test, where you look through a machine and choose between two lenses to find your sharpest vision. They'll also examine the front and back of your eye with specialized equipment and ask about any symptoms, medications, or family history of eye disease.

The doctor may dilate your pupils with drops so they can see the retina more clearly. This makes your vision blurry and your eyes sensitive to light for a few hours afterward, so plan to wear sunglasses on the way home or have someone drive you. Not every appointment includes dilation — your doctor will decide based on your age, risk factors, and what they find during the exam.

Key Takeaways

• Bring your insurance card, photo ID, and a list of any medications you take, including over-the-counter drops or supplements.
• Wear comfortable clothing and avoid heavy eye makeup on the day of your appointment, since the doctor needs clear access to your eyes.
• If your pupils will be dilated, arrange for someone to drive you home or plan to take a rideshare, because your vision will be blurry for several hours.
• The appointment includes vision testing, eye pressure measurement, and a physical exam of your eye structures to check for disease.
• Bring your current glasses or contact lens prescription if you have one, so the doctor can compare your vision to your current correction.

What to bring and how to prepare

Bring your insurance card and a photo ID to every appointment. If you have vision insurance separate from medical insurance, bring that card too. Write down any eye symptoms you've had in the past month — blurriness, floaters, flashes of light, dry eyes, or pain — and bring that list with you. The doctor will ask about these during the exam.

Bring your current glasses or contact lens prescription, or bring the glasses themselves if you have them. The doctor will use them as a baseline to measure how your vision has changed. If you wear contacts, you can wear them to the appointment, but some doctors prefer you remove them a few hours before so they can measure your eye's natural shape. Call ahead if you're unsure about your office's preference.

Avoid heavy eye makeup on the day of your appointment — the doctor needs to see your eyelids and the skin around your eyes clearly. Wear comfortable, loose clothing in case the doctor needs to recline your chair or position equipment close to your face. If you take any medications, bring the bottles or a list of names and doses, because some drugs affect eye health or interact with dilating drops.

Understanding your vision prescription

After the refraction test, your doctor will write a prescription with numbers for each eye. The first number is your sphere (SPH), which corrects nearsightedness or farsightedness. A minus sign means you're nearsighted; a plus sign means you're farsighted. The second number is your cylinder (CYL), which corrects astigmatism — an uneven curve in your cornea. The third number is your axis, which describes the angle of that curve. If you have no astigmatism, that space will be blank or say "0.00".

For contact lens wearers, the prescription also includes the base curve (how the lens fits your eye) and the diameter (the lens width). A contact prescription is different from a glasses prescription, so don't assume you can use one for the other. Your doctor will also note your pupillary distance (PD) — the distance between your pupils — which is needed to make glasses. Some doctors include this on the written prescription; others require you to ask for it separately.

The prescription is valid for one to two years depending on your state and age. Once you have it, you can fill it at any glasses or contact lens retailer — you don't have to use the one in the doctor's office, though many do offer frames and lenses on-site.

What different eye doctors do

An optometrist is trained to perform eye exams, write prescriptions for glasses and contacts, and diagnose common eye conditions like dry eye or presbyopia (age-related focusing problems). They can prescribe some eye drops and medications but cannot perform surgery. Most routine eye exams are done by optometrists.

An ophthalmologist is a medical doctor who can do everything an optometrist does, plus perform eye surgery, treat complex diseases like glaucoma or diabetic retinopathy, and manage eye conditions related to systemic diseases. If your exam reveals a serious condition, your optometrist may refer you to an ophthalmologist for further care or treatment.

An optician is not a doctor. They fill prescriptions for glasses and contacts but do not perform exams or diagnose conditions. If you already have a prescription, an optician can help you choose frames and ensure your lenses are made correctly.

Common tests and what they measure

The visual acuity test is the familiar eye chart where you read letters of decreasing size. It measures how clearly you see at a standard distance. The result is written as a fraction like 20/20 — the first number is the distance you're standing from the chart, and the second is the distance at which a person with typical vision could read those same letters. 20/40 means you need to stand 20 feet away to read what someone with typical vision reads at 40 feet.

The tonometry test measures the pressure inside your eye. The doctor may use a small probe that gently touches your cornea, or a puff of air. High eye pressure is a risk factor for glaucoma, a disease that damages the optic nerve. This test is painless and takes seconds.

The slit lamp exam uses a microscope with a thin beam of light to examine the front of your eye — the cornea, lens, and iris. The doctor can spot cataracts, scratches, infections, or other problems. The dilated eye exam uses drops to widen your pupils so the doctor can see the retina and optic nerve at the back of your eye. This is how they check for diabetic retinopathy, macular degeneration, and retinal detachment.

After your appointment: results and next steps

Before you leave, ask the doctor to explain any findings in plain language. If they found something abnormal — high pressure, a cataract, or signs of disease — ask what it means, whether it needs treatment now, and when you should come back. Some conditions like early cataracts don't need treatment yet but need monitoring. Others like high eye pressure may need medication or lifestyle changes to prevent damage.

If you need glasses or contacts, the doctor will give you a written prescription. You can take it to any retailer to fill it, or order online if you have your pupillary distance. If you need a new contact lens fitting, the doctor may schedule a separate appointment to measure your eye's shape and have you try on trial lenses before you order.

If the doctor referred you to an ophthalmologist or another specialist, ask for a referral form or request that your records be sent directly. Don't assume the referral is automatic — many offices require you to request it. Schedule your follow-up appointment before you leave, especially if the doctor found something that needs monitoring.

Frequently Asked Questions

Do I need to dilate my pupils at every eye exam?

No. Dilation is most important if you're over 60, have diabetes, high blood pressure, or a family history of eye disease. Younger people with no risk factors may not need it every year. Your doctor will decide based on your individual situation. If you're uncomfortable with dilation, ask whether it's necessary for your exam.

Can I wear contact lenses to my appointment?

Yes, but some doctors prefer you remove them a few hours before so they can measure your eye's natural shape. Call your office ahead of time to ask. If you do wear them to the appointment, bring your glasses as a backup in case the doctor asks you to remove the contacts during the exam.

How often should I have an eye exam?

Most adults without eye disease or risk factors should have an exam every one to two years. If you have diabetes, glaucoma, high eye pressure, or a family history of eye disease, your doctor will recommend more frequent visits — sometimes every three to six months. Ask your doctor what schedule is right for you.

What if I can't afford glasses or contacts after my exam?

Many retailers offer budget frames and lenses, and some nonprofits provide free or low-cost eyewear based on income. Ask your eye doctor's office about local resources. Some community health centers also offer discounted vision services.

Will my vision change after dilation drops?

Yes, temporarily. Your pupils will stay dilated for three to six hours, making your vision blurry and your eyes sensitive to light. Wear sunglasses outdoors and avoid driving until your vision clears. The effect is harmless and completely reversible.