What to Expect at Your Optometrist Appointment

What happens during an optometrist visit

An optometrist appointment typically lasts 45 minutes to an hour. You'll start in the waiting room with paperwork — usually a health history form and vision insurance information. Then a technician will take preliminary measurements: they'll test how well you see at different distances, check your eye pressure, and possibly take photos of the back of your eye. After that, you'll sit in the exam chair across from the optometrist.

The optometrist will ask you to look through a device called a phoropter — the large mechanical frame with multiple lenses. They'll flip different lens combinations in front of your eyes and ask "which is better, one or two?" repeatedly. This is called a refraction, and it measures whether you need glasses or contacts and what strength. They'll also check how your eyes move together, test your peripheral vision, and examine the front and back of your eye with a microscope called a slit lamp. At the end, they may dilate your pupils with drops so they can see the retina more clearly.

Key Takeaways

• Bring your insurance card, photo ID, and a list of any eye problems or medications you take, because the optometrist needs your full health history.
• The refraction — the "which is better, one or two" part — is the core of the exam and takes 10 to 15 minutes.
• If your pupils are dilated, your vision will be blurry and you'll be sensitive to light for 4 to 6 hours, so arrange for someone else to drive or plan to wait.
• You'll receive a written prescription for glasses or contacts that you can fill anywhere, not just at the optometrist's office.
• The appointment covers vision correction and eye health screening, but does not treat eye diseases — that requires a referral to an ophthalmologist.

What to bring and how to prepare

Bring your insurance card and a photo ID. If you wear glasses or contacts, bring them with you — the optometrist will want to check your current prescription. Write down any questions beforehand: changes in your vision, eye discomfort, medications you take, or family history of eye disease. This information helps the optometrist understand what to look for during the exam.

Wear comfortable clothing and avoid heavy eye makeup on the day of your appointment, because the optometrist will be looking closely at your eyelids and lashes. If you wear contact lenses, you can keep them in during most of the exam, but the optometrist may ask you to remove them for certain tests. Plan to be there for the full appointment time — don't schedule something immediately after, especially if dilation is likely.

Understanding the refraction and your prescription

The refraction is the part where the optometrist shows you different lenses and asks which one makes the chart clearer. They're measuring three things: sphere (how nearsighted or farsighted you are), cylinder (whether you have astigmatism, a focusing error), and axis (the angle of that error). The numbers on your prescription reflect these measurements.

Your prescription also includes your pupillary distance (PD), the distance between your pupils. This number is essential for ordering glasses, though some optometrists don't print it on the prescription — you can ask for it separately. The prescription is valid for one to two years, depending on your age and eye health. Once you have it, you can order glasses or contacts from any retailer, not just the optometrist's office.

What the eye pressure test and other measurements mean

The tonometry test measures the pressure inside your eye. A small puff of air or a gentle probe touches the surface of your eye — it's not painful, though it can feel startling. This test screens for glaucoma, a condition where high eye pressure damages the optic nerve. If your pressure is elevated, the optometrist may recommend follow-up testing or refer you to an ophthalmologist.

The optometrist will also check your visual acuity — how clearly you see letters on a chart at 20 feet away. They'll test each eye separately and together. If you see 20/20, that's considered normal vision. If you see 20/40, you need to be 20 feet away to see what most people see at 40 feet. The optometrist will also perform a cover test to see how well your eyes work together and check your eye movements in all directions.

Pupil dilation and what to expect afterward

If the optometrist dilates your pupils, they'll put numbing drops in your eyes first, then dilating drops. The numbing drops sting slightly for a few seconds. The dilating drops take 20 to 30 minutes to work fully. Once dilated, your pupils stay wide open, letting more light into your eye so the optometrist can see the retina, optic nerve, and blood vessels at the back of your eye.

After dilation, your vision will be blurry for 4 to 6 hours. You'll also be very sensitive to bright light — sunglasses are essential if you go outside. You cannot drive safely with dilated pupils, so arrange for someone else to drive you home or plan to take public transit. Not every appointment requires dilation — the optometrist will decide based on your age, health history, and whether they need a closer look at the back of your eye.

When you need a referral to an ophthalmologist

An optometrist can correct your vision and screen for common eye problems, but they cannot perform surgery or treat certain eye diseases. If the optometrist finds signs of glaucoma, cataracts, macular degeneration, diabetic retinopathy, or other conditions, they'll refer you to an ophthalmologist — a medical doctor who specializes in eye disease and surgery.

You don't need a referral from your primary care doctor to see an ophthalmologist; the optometrist's referral is enough. The ophthalmologist will do additional testing and decide on treatment. Your optometrist can still handle your routine vision correction and eye health screening, but the ophthalmologist manages the disease itself.

Insurance, costs, and what's covered

Most vision insurance plans cover one routine eye exam per year, though some cover two. The copay is typically $10 to $50. If you don't have vision insurance, an optometrist exam usually costs $100 to $200, depending on the complexity and location. Some optometrists offer discounts if you pay out of pocket.

Insurance usually does not cover the glasses or contacts themselves — that's a separate benefit with its own copay or allowance. If you need a new prescription, ask the optometrist for the written prescription so you can shop around for frames or contacts at any retailer. Bring your insurance information to the appointment so the office can verify your coverage before you're seen.

Frequently Asked Questions

Do I need to stop wearing contacts before my appointment?

Not necessarily, but it depends on the optometrist. Contacts can change the shape of your cornea temporarily, which can affect the refraction. Many optometrists ask you to remove contacts for at least a few hours before the exam, or to wear glasses for a day or two beforehand. Call ahead and ask — the office will tell you what they prefer.

What if I can't see the eye chart clearly during the refraction?

Tell the optometrist. They'll move you closer to the chart or use a smaller version. The refraction is a conversation — you're telling them which lens makes the chart clearer, and they adjust based on your feedback. There's no "right" answer you're supposed to guess; the optometrist is measuring your actual vision.

Can I get my prescription the same day?

Yes. The optometrist writes your prescription during the appointment and gives you a copy before you leave. You can then order glasses or contacts online or at a retail location. You don't have to order through the optometrist's office, though many offer that option.

What if my vision has changed a lot since my last exam?

Tell the optometrist at the beginning of the appointment. A sudden change in vision can signal a new refractive error, but it can also indicate an eye disease or a health problem like diabetes. The optometrist will do additional testing to figure out what's happening.

How often should I have an eye exam?

Most adults need an exam every one to two years. If you have diabetes, glaucoma, or other eye conditions, you may need exams more often. Children and older adults also typically need more frequent exams. The optometrist will tell you when to come back based on your individual situation.