|Distance Vision Test
to Eye Test Menu
test, also known as the Visual Acuity Test, tests the sharpness
of vision by grading the ability of the eye to discern diminishing
sizes of alphabets, numbers or shapes at a specified distance
of 6 metres.
- Click “Start Test” and a testing chart will be loaded. Measure the height of the biggest number (i.e. 5) in centimeters.
- Multiply the height by 0.72. (example: if the height of the biggest no. 5 is 4.2cm, take 4.2 x 0.72 = 3.02 meters. This means you should stand 3 meters away when testing your vision.
- Stand at the calculated distance from the monitor and read down to the smallest row of numbers that you can see.
- Test one eye at a time, first without your glasses and then with. Keep your other eye covered using an eye patch. To make a simple eye patch, just fold a piece of tissue paper, and tape it over your eye.
- Your visual acuity is given as a fraction (i.e. 6/60, 6/36, 6/24, 6/18, 6/12, 6/9, 6/6, or 6/5) designated to the smallest row of numbers you can read correctly.
- First test your right eye, then your left eye. Record your visual acuity without (unaided visual acuity) and with your glasses (aided visual acuity).
Normal good visual acuity is 6/6. If your visual acuity is
worse than 6/6, move on to the next test, the Pin Hole Test.
The Pin Hole Test will determine whether you need to wear
corrective glasses to see better.
Information On The Distance Vision Test
- Visual acuity results
are designated by fractions e.g. 6/60, 6/30, 6/24, 6/18, 6/12,
6/9, 6/6, 6/5. What do these fractions mean?
- When we
say that an eye has 6/24 visual acuity, we mean to say that
the smallest row of letters the tested eye can discern at
a distance of 6 metres is what a normal eye can discern at
a greater distance of 24 metres. From this, we can see that
the numerator 6 is a constant. The denominator varies and
a number greater than 6 would represent less than normal visual
acuity. The larger the denominator number, the poorer is the
- 6/6 visual
acuity is normal vision. 6/5 represents the fortunate 10 percent
of the population that has better than normal vision.
- The legal
visual requirement to obtain a driving license is 6/12 in
most countries. A person seeing worse than 6/60 despite best
spectacle correction is considered to be legally blind. About
10 percent of people are fortunate to have better than 6/6
vision, that is 6/5.
- The test
is ideally done at 6 metres because light rays from objects
seen at 6 metres and beyond reaches the eye as parallel rays
and in the NORMAL EYE are focused precisely onto the central
macula region of the retina without the need for any focusing
- In some
countries, normal visual acuity is designated as 20/20 which
simply is the same measurement designated in feet. In other
countries, the fraction is converted to a decimal figure but
they mean the same thing