What is Color Vision Testing?
In color vision testing, your ability to differentiate between colors is assessed. Eye doctors use this process too in determining whether you have color vision deficiency or color blindness.
Color blind tests can be classified into two. First are screening tests done to detect presence of a color vision problem, and the other are the more complex quantitative tests that can detect a color vision problem and at the same time identify its type and severity.
How is Color Vision Testing Done?
Screening tests done to detect presence of color blindness may vary, although it’s common procedure that you’re asked to sit in a comfortable position before the test starts. Regular room lighting is as well used. The eye doctor prients you about the process before moving forward to the test, itself.
There are also color blind tests online. Accuracy is, however, a concern in this type. It’s more advisable still to consult an eye doctor and undergo a color vision testing procedure as administered by a professional, and making use of standardized testing materials.
What is Ishihara Color Vision Testing?
Ishihara Color Vision Test is the most common and widely used screening test for color vision deficiency. It’s namesake of Shinobu Ishihara, the Japanese ophthalmologist behind the procedure.
The test makes use of a booklet with each page containing a circular pattern made up of dots that come in various colors, sizes, and brightness. These dots are arranged so that a person with normal eye vision can see a number within the plate while a colorblind one would not see it or will see a different number.
What is a quantitative color blind test?
This is a more detailed exam done to detect color blindness in a person as well as a person’s ability to see colors accurately.
The most famous of which is the Farnsworth-Munsell 100 Hue Test that makes use of four trays, each consisting of small disks with varying hues. A person needs to arrange the disks so that a sequence of changing hues is created.
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