What Happens During an Eye Exam

Medically reviewed by the Medical Advisory Council at U Vision Group.

If it has been a while since your last eye exam, or if this is your first as an adult, it helps to know what the appointment actually involves. A comprehensive eye exam is a sequence of short, painless tests, each looking at a different aspect of how your eyes work and how healthy they are. None of it requires anything difficult from you beyond reading a few letters and keeping your eyes open. This article walks through the exam from start to finish so you arrive knowing what each step is for and what the results mean.

The conversation before the tests

Every good exam starts with questions rather than equipment. Your optometrist will ask about any changes in your vision, headaches or eye strain, your general health, the medications you take, and whether eye conditions run in your family. This matters more than it might seem. Conditions like glaucoma and macular degeneration carry a genetic thread, and knowing your history shapes what we look for and how closely we monitor. Be candid here — even small details, like new floaters or trouble seeing at night, help direct the rest of the visit.

Measuring your prescription

The part most people picture is the refraction, where we determine whether you need correction and how much. You will look at a chart and compare lenses — the familiar “which is clearer, one or two?” — while we fine-tune the result. Often an automated instrument gives us a starting point first, which we then refine by hand against your own judgement. The outcome is your prescription for glasses or contact lenses, written so it can be filled anywhere. Because we are optometrists, not a sales team working on commission, the refraction is about getting the number right, not steering you toward a purchase.

Checking how your eyes work together

Seeing clearly is only part of the picture. Your eyes also need to move accurately, focus quickly, and team up to give you depth and comfortable single vision. We test eye alignment, focusing, and coordination because problems here cause eye strain, headaches, and difficulty with reading even when the prescription itself is fine. This is especially important for children and for anyone who spends long days on screens, where small coordination issues become tiring over time.

We also check your colour vision and your peripheral, or side, vision when it is warranted. A subtle loss of peripheral vision can be one of the earliest signs of glaucoma, and because it creeps in from the edges, most people never notice it on their own. None of these tests take long, and together they build a fuller picture of how your visual system is working than a simple letter chart ever could on its own.

Examining the front of the eye

Using a microscope called a slit lamp, we look closely at the eyelids, the surface of the eye, the cornea, and the lens. This is where we pick up dry eye, early cataract, and surface irritation that can make contact lenses uncomfortable. If your eyes feel gritty, tired, or dry, especially toward the end of the day, mention it. Routine surface dryness is something we manage, but when it is persistent or refractory, we may bridge you to the specialists at U Dry Eye Institute, who focus on advanced dry-eye diagnosis and treatment.

Measuring eye pressure and examining the back of the eye

We measure the pressure inside your eye, an important screening step for glaucoma. The modern instruments are quick and gentle, and the puff-of-air machine many people remember is no longer the only option. After that, we examine the retina and optic nerve at the back of the eye, sometimes using drops that widen the pupil so we can see more of the retina clearly. Dilation can leave your vision blurry and light-sensitive for a few hours, so it is worth bringing sunglasses and, if you are sensitive to it, arranging not to drive straight afterward. This part of the exam is where serious, silent conditions are most often first detected.

What happens after the exam

Once the tests are done, your optometrist will explain what they found in plain language — whether your prescription has changed, how your eyes are aging, and whether anything needs monitoring or further care. If everything is healthy, we will simply confirm when you are next due. If a finding needs surgical or subspecialty attention, we coordinate a referral to the team at Uptown Eye Specialists so you are not left navigating it alone. You can read more about the full process on our eye exams page, and if you wear or are considering contacts, our contact lens page explains how a fitting fits into the visit.

If you are ready for a check-up, you can book a comprehensive eye exam and we will take you through each of these steps at a comfortable pace.

Frequently asked questions

What happens during an eye exam? A comprehensive exam includes a health and history discussion, a refraction to measure your prescription, tests of eye coordination and focusing, an examination of the front of the eye, a check of eye pressure, and an examination of the retina and optic nerve at the back of the eye.

How long does an eye exam take? Most comprehensive exams take thirty to sixty minutes. If your pupils are dilated, plan for some extra time, as the drops take effect over fifteen to twenty minutes and the blur lasts a few hours afterward.

Does an eye exam hurt? No. The tests are painless. The eye-pressure measurement and dilation drops can feel briefly unusual, but nothing in a routine exam is uncomfortable.

Should I bring anything to my eye exam? Bring your current glasses or contact lenses, a list of your medications, sunglasses in case your eyes are dilated, and any notes about symptoms or family history of eye disease.

Medical disclaimer. This article is for general educational purposes only and is not medical advice. It is not a substitute for a professional assessment, diagnosis, or treatment from a qualified eye care provider. Every patient is different — individual circumstances vary, and the information here may not apply to your situation. Any outcomes described are general and are not a guarantee of results. If you have questions or concerns about your eyes or vision, please speak with a qualified eye care professional or book an assessment with us.