COLOR BLINDNESS
What is Color Blindness?
Color blindness (color vision deficiency) is the
decreased ability to see color or differences in color. It can impair
tasks such as selecting ripe fruit, choosing clothing, and reading
traffic lights. Color blindness may make some educational activities
more difficult. However, problems are generally minor, and most
color-blind people adapt.People with total color blindness
(achromatopsia) may also be uncomfortable in bright environments and
have decreased visual acuity.
How to test if you are Color Blindness?
The most common and widely used test for red green color blindness is
the Ishihara color test. The test is made up of 38
pictures, called plates. Each plate is comprised of hundreds of dots of
varying color and size. The central idea behind the test is that color
blind people will have difficulty spotting the hidden message in
contained within the multitude of dots due to inability to detect some
or all of the slight changes in the shades / colors of the dots.
The plates are designed to be increasingly harder to spot, which enables
the test to identify the severity of a subjects condition, as well as
the type (remember that within red green color blindness there are 4
separate color blindness types). It is relatively common to start with
an eight plate test, and if results are unclear or positive – to offer a
comprehensive twenty four plate test. The full thirty eight plate test
is very rarely used – to even lay eyes on the last fourteen plates you
would need to visit an eye specialist or order a full test from an
online store!
Your Test results will be shown here
- More Information: Color blindness from Wikipedia
- More Test Information: Color Blindness Tests & Identification from Visioneyesight
This is coded by Ying Wang