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 several tests to check how well you see and the health of your eyes. You'll sit in a chair facing different machines and answer questions about your vision history. The doctor will look directly into your eyes using a bright light and a magnifying lens called a slit lamp, and you'll read letters on a chart from across the room to measure your vision clarity.

Most appointments include a refraction test, where the doctor shows you different lens combinations and asks which one makes the letters sharper. This determines whether you need glasses or contacts and what strength. You may also have your eye pressure measured — a quick puff of air or a gentle probe against your eye — to screen for glaucoma. The doctor will dilate your pupils with drops so they can see the back of your eye, including the retina and optic nerve. This part takes 20 to 30 minutes because the drops need time to work, and your vision will be blurry and light-sensitive afterward.

Key Takeaways

• Bring your insurance card, photo ID, and a list of any medications you take, because some drugs affect eye health and pressure.
• Plan for your pupils to stay dilated for several hours after the appointment, so arrange a ride or avoid driving if possible.
• Wear comfortable clothes and avoid heavy eye makeup on the day of your appointment, since the doctor needs clear access to your eyes.
• Tell the doctor about any vision changes, eye pain, flashing lights, or floaters you've noticed, even if they seem minor.
• If you wear contacts, remove them before the appointment or bring your case, because the doctor needs to examine your bare eyes.

What to bring and how to prepare

Bring your insurance card and a photo ID. If you have a current glasses or contact lens prescription, bring those too — the doctor will want to know what you're currently wearing. Write down any medications you take regularly, including over-the-counter drugs and supplements, because some affect eye pressure or dry eye. If you've had eye surgery or injuries in the past, mention them.

Remove contact lenses before you arrive, or bring your case so you can take them out in the office. If you wear heavy eye makeup, wash it off beforehand — the doctor needs a clear view of your eyelids and lashes. Wear clothes you don't mind getting dilating drops on, since they can stain fabric. If you know you're sensitive to light or have had bad reactions to dilating drops before, tell the staff when you check in.

Vision tests the doctor will perform

The visual acuity test is the familiar one: you read letters on a chart from 20 feet away. The doctor will cover one eye at a time and ask you to read smaller and smaller lines until the letters blur. This gives a measurement like 20/20 or 20/40, which tells you how clearly you see compared to a standard.

The refraction happens in a machine called a phoropter. The doctor flips different lenses in front of your eyes and asks "Is this one better, or this one?" repeatedly. You're helping them find the exact lens power that makes your vision sharpest. This is how they determine if you need glasses, contacts, or a new prescription.

The tonometry test measures the pressure inside your eye. There are several ways to do this — some machines use a puff of air, others use a small probe that barely touches your eye after numbing drops. High pressure can signal glaucoma, which damages vision over time if untreated.

The dilated eye exam comes last. After the doctor puts dilating drops in your eyes, you'll wait 20 to 30 minutes for your pupils to open wide. Then the doctor uses a bright light and magnifying lens to look at the retina, optic nerve, and blood vessels at the back of your eye. This is the only way to see the back of your eye clearly and catch problems like diabetic retinopathy, macular degeneration, or detached retinas early.

Understanding your prescription and results

If you need glasses or contacts, the doctor will write you a prescription. It includes numbers for each eye — sphere (the main focusing power), cylinder (for astigmatism if you have it), and axis (the angle of that correction). There's also an "add" number if you need help with reading. The prescription is valid for one to two years, depending on your state and the doctor's judgment about how stable your vision is.

The doctor will also tell you about the health of your eyes. Normal results mean no signs of disease or damage. If the doctor finds something — dry eye, early cataracts, signs of diabetes affecting your eyes, or high pressure — they'll explain what it means and what to do next. Some findings need treatment or monitoring; others just need you to know about them. Ask the doctor how often you should come back. People with diabetes, glaucoma risk, or a family history of eye disease usually need yearly exams. Others might go every one to two years.

What to expect after dilation

Your pupils will stay dilated for three to six hours after the appointment. During that time, your vision will be blurry, especially up close, and bright light will feel uncomfortable. You won't be able to read comfortably or focus on a screen. Sunglasses help with the light sensitivity. Do not drive if you feel unsafe — the blurriness and glare make it hard to see the road clearly.

Some people experience a mild headache or eye strain as their pupils return to normal, but this is temporary. If you have severe pain, sudden vision loss, or flashing lights after the appointment, contact your eye doctor right away — these are not normal side effects of dilation.

When to schedule your next appointment

The doctor will recommend how often you need to return. If you have no eye disease and your vision is stable, you might come back in one to two years. If you have diabetes, glaucoma, high eye pressure, or a family history of eye disease, you'll likely need yearly exams or more often. If the doctor prescribed new glasses or contacts, you can pick those up once the prescription is ready — usually within a few days to a week.

If you notice vision changes, eye pain, flashing lights, floaters, or a shadow in your peripheral vision between appointments, contact your eye doctor. These can signal a problem that needs prompt attention, like a detached retina or acute glaucoma.

Frequently Asked Questions

Do I need to fast before an eye appointment?

No. You can eat and drink normally before an eye exam. There are no fasting requirements like there are for blood tests. You can take your regular medications as scheduled.

Can I wear my contacts during the eye exam?

No. Remove your contacts before the appointment or bring your case to take them out in the office. The doctor needs to examine your bare eyes to measure your vision accurately and check the health of your cornea and conjunctiva.

Will the dilating drops hurt?

The drops themselves don't hurt, though some people feel a slight sting or coolness. The doctor may use numbing drops first if they're checking your eye pressure. The main discomfort is the blurriness and light sensitivity afterward, which fade as your pupils return to normal.

What if I have astigmatism or presbyopia?

Astigmatism is an irregular curve in your cornea that blurs vision at all distances. Presbyopia is age-related difficulty focusing on close objects, usually starting around age 40. Both are common and correctable with glasses or contacts. The refraction test will measure both, and your prescription will include the numbers needed to correct them.

How often should I get my eyes checked?

Adults with no eye disease and stable vision typically need an exam every one to two years. People with diabetes, glaucoma, high eye pressure, or a family history of eye disease should have yearly exams or more often, as recommended by their doctor. Children and older adults may need different schedules — ask your doctor what's right for you.