Eye Test Chart

View a Snellen eye chart at the correct distance to check your visual acuity at home.

Cover one eye:
Test both eyes open. Then test each eye separately by covering the other eye with your hand (don't press on the eye).
E
FP
TOZ
LPED
PECFD
EDFCZP
FELOPZD
DEFPOTEC
LEFODPCT
How to read your result
20/20Normal vision
20/30–20/40Mild impairment
20/50–20/70Moderate — see optometrist
20/100+Poor — see optometrist soon

This is a basic screening check only. It cannot diagnose eye conditions. Visit a qualified optometrist or ophthalmologist for a proper eye exam and prescription.

How to use this eye chart

1
Set your distance. Select the distance from the dropdown above and position yourself at that exact distance from the screen.
2
Test both eyes first. Keep both eyes open and read the smallest row you can see clearly.
3
Test each eye separately. Cover your left eye with your hand (without pressing) and read again. Repeat covering the right eye.
4
Note your acuity. The lowest row you can read correctly is your approximate visual acuity. If you need glasses, wear them for the test to check corrected vision.

Frequently asked questions

Is this test as accurate as a professional eye exam?

No. This is a simple screening tool to get a rough idea of your distance visual acuity. A professional eye test checks much more — near vision, eye pressure (glaucoma screening), retina health, colour vision, depth perception, and precise prescription measurement. Visit an optometrist for a complete examination.

What does 20/20 vision actually mean?

20/20 means you can read at 20 feet what a person with normal vision can read at 20 feet. In metric terms, this is 6/6. It represents normal, average visual acuity — not "perfect" vision. Many people have 20/15 (better than average) vision.

Can I use this on a phone?

Yes, but select 40 cm distance and hold your phone at that distance. Smaller screens mean the chart will be smaller; the calculation adjusts font sizes for your selected distance. For best results, use a larger monitor or tablet.

I can read 20/20 but my eyes feel strained. Should I see a doctor?

Yes. Eye strain (asthenopia) can occur even with normal distance acuity — it may indicate a need for reading glasses, astigmatism, binocular vision problems, or simply digital eye strain from screen use. An optometrist can identify and treat these issues.

How often should I have a professional eye exam?

Adults with no known eye problems should have a full eye test every 2 years. Over 40, annual checks are recommended due to increased risk of glaucoma, cataracts and age-related macular degeneration. People with diabetes should have annual diabetic retinopathy screening.