Why Eye Exams Are About More Than Your Vision
A comprehensive eye exam is not just about updating your glasses prescription. Your eyes are a window into your overall health — during a thorough examination, an optometrist or ophthalmologist can detect early signs of conditions like diabetes, high blood pressure, multiple sclerosis, and even certain cancers, often before you have any other symptoms. Regular exams are one of the most underutilised preventive health tools available.
Preparing properly ensures you give your eye care professional everything they need to give you the most accurate, complete assessment possible.
Before Your Appointment: What to Gather
Arriving organised saves time and helps your practitioner understand your full eye health picture.
Documents and Information to Bring
- Previous prescription(s): Bring your current glasses and/or contact lens prescription, or the physical eyewear itself so it can be measured.
- List of medications: Include all prescription drugs, over-the-counter medicines, vitamins, and supplements. Many medications — including antihistamines, antidepressants, and blood pressure drugs — affect eye health.
- Family eye health history: Note any relatives with glaucoma, macular degeneration, cataracts, retinal detachments, or other eye conditions.
- Personal medical history: Conditions like diabetes, autoimmune disorders, and thyroid disease can all impact the eyes.
- Health insurance details: Check what your cover includes for eye exams, lenses, and specialist referrals.
Preparing Your Questions and Concerns
Write down any symptoms or concerns you've noticed before your appointment — it's easy to forget them once you're in the exam chair. Common things to mention include:
- Blurred vision (at distance, near, or both)
- Floaters or flashes of light
- Dry, itchy, or watering eyes
- Headaches related to visual tasks
- Difficulty driving at night
- Changes in colour perception
- Eye pain or pressure
Also note when symptoms occur (morning vs. evening, after screen use, etc.) and how long you've been experiencing them.
Practical Day-of Preparations
- Wear contact lenses sparingly (or not at all). If you wear soft contact lenses, remove them at least a few hours before the exam if possible — some tests are more accurate when contacts haven't been worn. For rigid gas-permeable lenses, many practitioners recommend removing them for several days before a full refraction.
- Arrange transport if needed. If your pupils are likely to be dilated (which blurs near vision and causes light sensitivity for several hours), you may not be comfortable driving immediately afterward. Check with the practice in advance, and arrange a lift if needed.
- Bring sunglasses. Post-dilation, your eyes will be sensitive to light. Sunglasses make the journey home far more comfortable.
- Avoid eye makeup if possible. Heavy eye makeup can interfere with certain tests and measurements.
- Eat normally. Unlike some medical tests, eye exams don't require fasting — eat as you normally would.
What to Expect During the Exam
A comprehensive eye exam typically includes several components:
| Test | What It Assesses |
|---|---|
| Visual acuity test | How clearly you see at various distances |
| Refraction | Your exact prescription (lens power needed) |
| Slit-lamp examination | Health of the cornea, lens, and anterior structures |
| Tonometry | Intraocular pressure (glaucoma screening) |
| Dilated fundus exam | Retina, optic nerve, and blood vessel health |
| Visual field test | Peripheral vision assessment |
| Colour vision test | Ability to distinguish colours |
| Eye muscle test | Alignment and coordination of the eyes |
After Your Appointment
Don't leave without clearly understanding your results, any follow-up actions needed, and when your next exam should be. If you're given a new prescription, check whether it differs significantly from your current one — a large change may require a gradual adaptation period. And if anything was flagged during the exam, act on referrals promptly rather than waiting "to see how it goes."
Regular eye exams — typically every one to two years for adults, more frequently for those with conditions or risk factors — are a small investment with a potentially enormous return for your long-term vision health.