Home eyesight test at a glance
- A home eyesight test is performed with a Snellen chart printed in A4 format, from a distance of 3 meters, with good and even lighting.
- Each eye is tested separately, covering the other with a hand, without pressing on the eyeball. Glasses or contact lenses are worn as they are on a daily basis.
- For small children, the “E game” is used – the child points with their hand in the direction the arms of the letter are facing.
- A home test does not replace an eye examination. It only detects a decrease in visual acuity. It does not assess intraocular pressure, the fundus, or the optic nerve – and these are where the most dangerous eye diseases develop. See diagnostic tests at SwissLaser.
Have you ever wondered if what you see is truly world-class quality, or if your eyesight is slowly starting to deceive you? In the daily rush, it’s easy to dismiss small signs – squinting when reading labels or friends on the street appearing somewhat “blurry.” Although in our Swisslaser clinics in Warsaw and Krakow we use technology that looks like something out of science fiction movies, you can take the first step yourself, without even getting out of your pajamas. A home test is a great way to quickly check your “lenses” and an ideal starting point for a conversation with a doctor. Ready for a little experiment?
What will you learn from the text below?
- Can a home test replace a doctor’s visit? Absolutely not. A home examination only provides an indicative result and can never replace a professional diagnosis in the office.
- Who should not test their eyesight at home? If you have a child under 3 years old, skip the home tests and immediately schedule an appointment with a pediatric ophthalmologist.
- What are the best conditions for conducting the test? Find a well-lit room, prepare a measuring tape, and make sure the distance from the wall is exactly 3 meters.
- How often should you visit an ophthalmologist? In addition to home tests, it’s worth knowing how often you should have your eyesight checked by a specialist to avoid missing anything.
- What to do if the test result is poor? Don’t panic, but don’t delay either – if you notice abnormalities or differences between your eyes, be sure to schedule a professional examination.
Preparing for a home eyesight test: Your starter kit
Before you turn your living room into a professional mini-clinic, you need to gather a few things. Don’t worry, you probably already have most of them on hand, hidden somewhere in a drawer with odds and ends.
Essential tools: What do you need to prepare?
What will you need? Prepare a printed test card (preferably download the version for yourself: card for adults or card for children), adhesive tape, a measuring tape, a flashlight, and something to cover one eye. Sounds like a plan for an afternoon workshop with a child? Because it’s actually quite fun!
Ideal conditions: Lighting and a 3-meter distance
Precision is your middle name here. Measure exactly 3 meters from a wall without windows, and place a chair there. Stick the chart on the bare wall, exactly at the eye level of the person who will be reading it. Remember that the lighting must be bright and even – if the room is dim, your result will be meaningless.
Home eyesight test step by step: Instructions for everyone
Before we start: if you wear glasses or contact lenses daily, put them on! We want to check how your current correction performs in “battle,” not how you manage without it.
How to test eyesight in a small child? The “E game”
Instead of boring letter reading, suggest an “E game” to your little one. Show the child a card with a large letter E and teach them to point with their hand in which direction the “legs” of the letter are facing – up, down, left, or right. This is a fantastic way to check a toddler’s eyesight without stress or tears.
Test for adults and older children
Sit comfortably in a chair, cover one eye (remember: do not press on the eyeball!) and read the letters line by line, starting from the top. It’s good to have someone to help – that person can shine a flashlight on the text and write down the number of the last line where you correctly guessed more than half of the characters. Then switch eyes and repeat the entire procedure.
Interpreting results: When is it worth scheduling a visit?
“Treat a home test like the early warning system in your car,” explains Dr. Victor Derhartunian. “If, as an adult, you can’t read the 20/20 line, and your five-year-old has trouble with the 20/30 row, that’s a signal that we need to meet in the office. The most important red flag is a situation where each eye sees differently – that always requires a specialist’s check-up.”
What are the norms for children and adults?
A child aged 3-4 should see the 20/40 line, and a five-year-old 20/30. You, as an adult, should aim straight for 20/20. Remember, however, that one weaker result is not the end of the world – maybe you just had a tough day? Repeat the test tomorrow to be sure.
Case study: Mr. Marek and his “home discovery”
Patient: Mr. Marek, 42 years old, professional driver.
History: Marek took the test completely by chance when he was testing his son’s eyesight before he went to school.
“I was always convinced that I had razor-sharp vision. During this game at home, it turned out that with my right eye, I couldn’t see even half of what I could with my left! At Swisslaser, Dr. Derhartunian quickly detected developing astigmatism. If it weren’t for that silly test in the living room, I probably would have suffered from headaches behind the wheel for a long time, thinking it was just fatigue,” the patient recalls.
FAQ – Frequently asked questions
1. Is a home result as important as a doctor’s prescription?
Definitely not. A home examination will not show us diseases hidden deep in the eye, such as glaucoma or changes in the fundus. It’s just information about whether your acuity is okay.
2. My child keeps peeking during the test – what should I do?
That’s classic! It’s best to ask a loved one to hold the cover over the child’s eye. Even the smallest gap will allow the little one to “cheat” the result, and we want the truth, right?
3. Why shouldn’t I press on the covered eye?
Try pressing your eye and releasing it – for a moment, the world will be blurry. If you press the eyeball during the test, when you uncover it, it won’t see correctly for a few minutes, which will completely ruin your result.
4. What if I see great sometimes and poorly at others?
Visual acuity can fluctuate when we are tired or have dry eyes. If the results vary significantly, it’s worth checking at Swisslaser whether it’s dry eye syndrome or other health problems.
5. Is that flashlight really necessary?
Yes! Illuminating the letters helps eliminate errors that can result from silly shadows cast in the room. We want to check your eyesight, not how you cope with puzzles in dim light.
6. How to test eyesight at home?
Print a Snellen chart in A4 format, hang it at eye level, and stand 3 meters away in good lighting. Test each eye separately, covering the other with your hand, and read consecutive lines from top to bottom.
7. Is a home eyesight test reliable?
It provides indicative information about visual acuity and allows you to notice the difference between your eyes. It is not a diagnostic test – it will not detect glaucoma, changes in the fundus, or early-stage cataracts.
8. How to test the eyesight of a child who doesn’t know letters?
Using the “E game” method: the child points with their hand in which direction the arms of the letter E are facing. The test is performed the same way, eye by eye.
9. When to go to an ophthalmologist despite a good home test result?
For headaches, squinting, double vision, floaters, flashes, sudden worsening of vision, and preventively after the age of 40 – even if the home test was good.
Sources
- Chuck RS, Dunn SP, Flaxel CJ et al. Comprehensive Adult Medical Eye Evaluation Preferred Practice Pattern. Ophthalmology 2021;128(1):P1–P29. doi:10.1016/j.ophtha.2020.10.024
- GBD 2019 Blindness and Vision Impairment Collaborators. Causes of blindness and vision impairment in 2020 and trends over 30 years. Lancet Glob Health 2021;9(2):e144–e160. doi:10.1016/S2214-109X(20)30489-7
