What to Expect at Your Eye Check Appointment

What happens during an eye check

An eye check — also called a comprehensive eye exam or vision screening — is a series of tests that measure how well you see and check the health of your eyes and vision system. A doctor of optometry or ophthalmology performs these tests, usually in about 30 to 60 minutes depending on what they find and whether you're a new patient.

The appointment typically starts with questions about your medical history, current medications, and any vision problems you've noticed. Then you'll move through a sequence of tests: reading letters on a chart to check your distance vision, looking through a machine called a phoropter to find your correct lens prescription, checking how your eyes move together, measuring the pressure inside your eye, and examining the structures at the front and back of your eye with specialized equipment. The doctor may dilate your pupils with drops to see the retina and optic nerve more clearly.

At the end, the doctor discusses the results with you, explains what they found, and talks about any changes to your prescription or concerns about your eye health. If you need glasses or contacts, they'll give you a prescription you can take to an optician or use to order online.

Key Takeaways

• Bring your insurance card, photo ID, and a list of any medications you take, including over-the-counter drugs and supplements.
• Plan to arrive 10 to 15 minutes early to fill out a health history form, and budget 30 to 60 minutes for the full appointment.
• Your pupils will be dilated with drops during the exam, which blurs your vision for a few hours afterward — arrange a ride or plan not to drive.
• The doctor will discuss your results and any changes to your prescription before you leave, and you can ask questions about your eye health or vision correction options.

What to bring and how to prepare

Bring your current insurance card and a photo ID. If you have vision insurance through your employer or a government program, bring that card too — it may cover part or all of the exam cost. If you're a new patient, the office will ask you to arrive 10 to 15 minutes early to complete a health history form, so plan accordingly.

Write down any medications you take — prescription, over-the-counter, and supplements — because some can affect your eyes or how they respond to dilating drops. If you wear glasses or contacts, bring them with you; the doctor may want to check your current prescription. If you've had eye exams at another office and have old prescriptions or records, you can ask that office to send them ahead, though it's not required.

Wear comfortable clothing and avoid heavy eye makeup on the day of your appointment, since the doctor 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 some doctors prefer you remove them beforehand — the office will tell you when you schedule.

Understanding the tests and equipment

The visual acuity test is the familiar one: you read letters on a chart from across the room to measure how clearly you see at distance. The phoropter is the large machine with multiple lenses that the doctor uses to find your exact prescription — they'll ask you "which is better, one or two?" as they flip lenses in and out.

The tonometry test measures the pressure inside your eye, which helps screen for glaucoma. You'll rest your chin on a support while a small probe gently touches the front of your eye, or the doctor may use a puff of air instead — neither hurts. The slit lamp is a microscope with a bright light that lets the doctor examine the front of your eye in detail, checking for cataracts, dry eye, or infection.

If the doctor dilates your pupils with drops, your vision will be blurry and you'll be sensitive to light for two to four hours afterward. This is temporary and harmless. The dilated exam lets the doctor see the retina and optic nerve at the back of your eye, which is important for detecting conditions like diabetic retinopathy, macular degeneration, and glaucoma damage. Some offices also use a retinal camera — a non-invasive imaging device — instead of or in addition to dilation.

What your prescription means

If you need glasses or contacts, the doctor will write you a prescription with numbers for each eye. The prescription includes sphere (the main focusing power), cylinder and axis (if you have astigmatism), and sometimes add power (if you need help focusing up close). These numbers tell an optician or online retailer exactly what strength lens you need.

A prescription for glasses is valid for one to two years in most states, though some states allow three years. A contact lens prescription is separate from a glasses prescription and expires after one year. You'll need a separate contact lens fitting appointment if you want to switch from glasses to contacts, because contacts sit directly on your eye and require a different measurement.

If your prescription has changed significantly, the doctor may recommend new glasses or contacts. If it's stayed the same, you can keep wearing what you have. Ask the doctor how often you should return for a follow-up exam — typically every one to two years for adults without eye disease, but more often if you have diabetes, glaucoma, or other conditions.

Why your pupils dilate and what to expect afterward

Dilating drops widen your pupils so the doctor can see the retina and optic nerve without obstruction. The drops take 20 to 30 minutes to reach full effect and wear off over two to four hours. During that time, your vision will be blurry at all distances, and bright light will feel uncomfortable — you may want to wear sunglasses even indoors.

You should not drive while dilated. If you drove to the appointment, ask a friend or family member to pick you up, use a taxi or rideshare service, or reschedule your appointment for a time when you can arrange a ride. Some offices offer rides or can call a car service for you if you ask ahead.

Dilating drops are safe for most people, but tell the doctor if you have narrow angles in your eye (a risk factor for angle-closure glaucoma) or if you're pregnant, because some doctors avoid dilation in those cases. If you're allergic to any medications, mention that when you check in.

Questions to ask your eye doctor

Before you leave, ask about your eye health results: Do you have any signs of disease? Are there changes in your vision or prescription? If the doctor found something, ask what it means, whether it needs treatment, and how often you should return for follow-up.

If you're considering glasses or contacts, ask about your options. For glasses, you can ask about lens coatings (anti-glare, blue light filtering, photochromic) and frame styles. For contacts, ask about different types — daily disposables, weekly, or monthly — and whether you're a good candidate. If you have dry eye, ask what you can do to manage it. If you spend a lot of time on screens, ask whether you need a special prescription for computer work.

Ask how often you should return for your next exam. If you have a family history of eye disease, ask whether you're at higher risk and what you can do to protect your vision.

After your appointment: using your prescription and follow-up care

Once you have your prescription, you can take it to an optical shop, order glasses online, or get contacts from a contact lens provider. Your prescription is yours to keep and use anywhere — the doctor cannot withhold it. If you order online, make sure the website asks for your pupillary distance (PD), which is the distance between your pupils; the doctor's office can measure this for you if it's not on your prescription.

If you had dilating drops, avoid driving and strenuous activity until your vision clears. You can return to normal activities once the blurriness fades, usually within a few hours.

Mark your calendar for your next eye exam. If the doctor recommended a follow-up sooner than your regular checkup — for example, to recheck eye pressure or monitor a new finding — schedule that appointment before you leave. If you develop new vision problems, eye pain, flashes of light, or a sudden increase in floaters before your next scheduled exam, contact your eye doctor right away.

Frequently Asked Questions

Do I need to fast before an eye exam?

No, you don't need to fast or avoid food and drink before an eye check. You can eat and drink normally. However, avoid caffeine or alcohol right before the appointment if you're nervous, since they can affect your blood pressure and eye pressure measurements.

Will the exam hurt?

No. The tonometry test (eye pressure measurement) may feel slightly uncomfortable as the probe touches your eye, but it doesn't hurt. If the doctor uses a puff of air instead, you'll just feel a small burst. Dilating drops may sting slightly for a few seconds, but that's the only sensation you'll notice.

Can I wear my contacts during the eye exam?

Yes, most doctors allow you to wear contacts during the exam. However, some prefer you remove them beforehand so they can measure your cornea accurately. Call the office when you schedule to ask what they prefer, or mention it when you arrive.

What if I can't afford the exam?

Many community health centers and optometry schools offer reduced-cost or sliding-scale eye exams based on income. Some charitable organizations also provide free or low-cost vision care. Ask your doctor's office about payment plans, or search for "free eye exam near me" to find local programs.

How often should I have an eye check?

Adults without eye disease or risk factors typically need an exam every one to two years. If you have diabetes, glaucoma, high blood pressure, or a family history of eye disease, your doctor may recommend annual exams or more frequent visits. Ask your eye doctor what schedule is right for you.