What to Expect at Your Eye Exam Appointment

What happens during an eye exam

An eye exam is a routine appointment where an optometrist or ophthalmologist tests your vision and checks the health of your eyes. The appointment usually lasts 30 to 60 minutes. You'll read letters on a chart, look through a machine called a phoropter that shows you different lens strengths, and have your eye pressure measured. The doctor will also look inside your eye with a light and magnifying lens.

If you need glasses or contacts, the doctor will write you a prescription at the end. If they find a problem—like an infection, high pressure, or damage to the retina—they'll explain what it means and what to do next. Most eye exams are straightforward, but knowing what to bring and what to expect makes the appointment go faster.

Key Takeaways

• Bring your insurance card, photo ID, and a list of any medications you take, because some drugs affect your eyes.
• Wear comfortable clothes and avoid heavy eye makeup on the day of your appointment, since the doctor will need clear access to your eyes.
• The exam includes a vision test, eye pressure check, and internal eye inspection, and takes 30 to 60 minutes total.
• If you get a new prescription, you can use it to order glasses or contacts from any retailer, not just the doctor's office.
• Schedule your next appointment before you leave, because eye exams are usually needed once a year or every two years depending on your age and health.

What to bring to your appointment

Bring your insurance card and a photo ID. If you have vision insurance through your college or family plan, the card will tell the office what they can bill directly. Bring your current glasses or contacts if you have them—the doctor may want to check the prescription or see how well they're working for you.

Write down any medications you take regularly, including over-the-counter drugs and supplements. Some medications dry out your eyes or affect how you see, and the doctor needs to know. If you've had eye problems before or eye surgery, bring any paperwork from that visit. If you don't have it, tell the doctor the approximate date and what happened—they can often request old records.

How to prepare the day of your appointment

Wear comfortable clothes. You don't need to dress up, and you'll be more relaxed if you're comfortable. Avoid heavy eye makeup, thick eyeliner, or mascara, because the doctor needs a clear view of your eyelids and lashes. If you wear makeup, keep it light or skip it that day.

Don't wear contact lenses if you can avoid it. If you must wear them, tell the doctor when you arrive. Contacts change the shape of your cornea temporarily, which can affect the accuracy of your vision test. If you wear contacts regularly, the doctor may ask you to leave them out for a few hours before your next appointment so they can get a true reading.

Eat normally and arrive 10 to 15 minutes early to fill out paperwork. The paperwork asks about your medical history, whether you have eye problems in your family, and what you use your eyes for most (reading, screens, distance work). Answer honestly—this information helps the doctor understand what to look for.

Understanding your prescription

If you need glasses or contacts, the doctor will give you a written prescription. The prescription includes numbers for each eye and is valid for one to two years depending on your state. You can take this prescription to any glasses or contacts retailer—you're not required to buy from the doctor's office, and prices vary widely.

The prescription has columns labeled OD (right eye) and OS (left eye). The first number is your sphere (how nearsighted or farsighted you are). The second is your cylinder (astigmatism, if you have it). The third is your axis (the angle of astigmatism). For contacts, there's also a base curve and diameter. If you don't understand what the numbers mean, ask the doctor before you leave—they can explain what each one does and why you need it.

What to do if you need glasses or contacts

Once you have your prescription, you can order online, go to a chain retailer like Warby Parker or LensCrafters, or visit an independent optician. Online ordering is often cheaper, but you need to know your pupillary distance (PD)—the distance between your pupils. Ask the doctor for this number; they should provide it automatically, but if they don't, ask. Without it, you can't order online.

If you're ordering contacts, you'll need to confirm your prescription with your doctor's office first. Contacts are a medical device and require a valid prescription plus a fitting. The fitting is separate from the exam and may cost extra. If you've never worn contacts, the doctor or an optician will show you how to put them in and take them out before you leave.

Common reasons your appointment might take longer

If you haven't had an eye exam in several years, the appointment may run longer because the doctor will do a more thorough check. If you have diabetes, high blood pressure, or a family history of eye disease, the doctor may dilate your pupils (put in drops that make them bigger) so they can see the back of your eye better. Dilation takes 20 to 30 minutes to wear off, so plan for that if you have somewhere to be afterward.

If the doctor finds something that needs follow-up—like high eye pressure, a spot on the retina, or signs of an eye disease—they'll explain it and may schedule you for additional testing or a follow-up visit. This doesn't mean something is seriously wrong; it usually just means they want to monitor it or get more information. Ask what the next step is and when you should come back.

Scheduling your next appointment

Before you leave, ask the front desk when you should come back. Most people need an eye exam every one to two years. If you're under 18, have diabetes, or have a family history of eye disease, you may need to come more often. If the doctor found something that needs monitoring, they'll tell you the specific timeframe.

Schedule your next appointment before you leave the office. This is easier than calling back later, and it ensures you won't forget. If you're a student, check whether your college health center offers eye exams or has a partnership with a local optometrist—this can be cheaper than going to a private practice.

Frequently Asked Questions

Do I need to fast before an eye exam?

No. You can eat and drink normally before an eye exam. There are no dietary restrictions. Just avoid heavy caffeine right before if you tend to get jittery, since you'll be sitting still and focusing on small details.

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

Many retailers offer discounts for students or low-income customers. Check whether your college has a vision plan or partnership. Some community health centers offer reduced-cost exams and glasses. Ask the doctor's office if they know of local resources.

Can I drive after my eye exam if my pupils are dilated?

Dilation makes your eyes sensitive to light and blurs your vision for 20 to 30 minutes. If your pupils are dilated, bring sunglasses or ask someone to drive you. If you drove yourself, wait in the waiting room until the dilation wears off before driving home.

What's the difference between an optometrist and an ophthalmologist?

An optometrist does routine eye exams, writes prescriptions for glasses and contacts, and diagnoses common eye conditions. An ophthalmologist is a medical doctor who can do everything an optometrist does plus perform eye surgery and treat complex eye diseases. For a routine exam, either is fine.

How often do I need an eye exam if I don't wear glasses?

Even if you see clearly, you should have an eye exam every one to two years. The exam checks for diseases like glaucoma and diabetic retinopathy that have no symptoms in early stages. Catching these early makes a big difference in treatment.