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Common color blindness testing techniques
To diagnose color blindness, doctors can use one of two types of color blindness tests: qualitative test (helps detect the presence of vision problems) and quantitative test (this technique is more sophisticated, can help determine the color vision defect and the type and severity of the patient's color blindness).
Qualitative test when examining color blindness
This standard color blindness testing technique is quite commonly used for color blindness. The qualitative test, also known as the Ishihara color vision test, consists of a small book and each page contains a circular drawing pattern, in It contains many small dots with different colors, sizes, and densities. The small dots on each page will be arranged in a certain pattern but seemingly randomly. Normal people will recognize that in those rows of small dots there will be a number 1 or 2, but people with color blindness will not.
In addition, doctors can also use Ishihara discs to screen for color blindness in patients, accordingly, if they are blue color blind, they will not be able to see the red numbers in these images. Each color blindness measurement chart of the Ishihara color vision test will have a full set of 38 discs, there is also a shortened version of 14 or 24 discs and is used more often in comprehensive eye examinations.
Since the introduction of the Ishihara color vision test, many medical device companies have developed similar color blindness screening tests, using color-matching dummy discs.
Quantitative test in color blindness examination
If you want to analyze color blindness in more detail, whether or not the patient has the ability to recognize colors, you need to use quantitative testing techniques in color blindness examination and the most popular test is still the Farnsworth-color test. Munsell 100. This test will include 4 trays, which will contain many small discs of different colors (each tray will have a reference color disc at the bottom) and the test taker will have to arrange the colored discs. different in the tray to form a continuous series of increasing colors. If you want accurate results when testing for color blindness, you need to perform the Farnsworth-Munsell 100 color test in a place with lighting that is closest to natural light during the day.
With this testing technique, each color disc will be numbered at the bottom to get accurate results. If the color is more similar to the sample, it shows the color recognition ability of the color blind tester. the more accurate. The Farnsworth-Munsell 100 color test technique not only helps detect whether the person being tested is color blind or not, but also helps determine the type and severity of the examinee's color blindness.
Who should take a color blind test (https://colorblind-test.io)?
Standard color blindness test can be performed on anyone who needs to work on the ability to recognize colors accurately such as advertising artists, electricians, designers...
In many cases, if you suspect you have problems identifying different colors, you should also be examined for color blindness because the disease may be present from birth but the patient is unaware of the defect. This vision persists until adulthood and the disease more or less affects life and work.
If the color vision disorder is hereditary, there is no remedy or treatment that the patient must accept and live with. If the disease is caused by another cause, there may be remedies depending on the cause

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