Should I Get Tested for Color Vision Deficiency? - Ophthalmology

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Should I get tested for color vision deficiency?


Recently, I had a labor health check because I needed to work, and there was a color vision test with a number chart.
I initially answered incorrectly and took a long time to see the correct answer.
Although the health examination center reported my results as normal, I still feel uneasy.
Throughout my life, my color vision tests have always been normal, and I find it easy to see numbers without any issues with color confusion.
The next day, I took a driving license medical examination, and this time I passed the color vision test easily, answering correctly on the first try.
I have also taken various color vision tests online, and all the testing websites indicate that I do not have color vision deficiency.
I would like to ask if it is normal for me to take longer to see some images? Is it possible that the test chart was outdated or that my eyes were uncomfortable in the morning, affecting my vision and making the test more challenging at that time?

Han, 10~19 year old female. Ask Date: 2018/06/07

Dr. Cai Wenyuan reply Ophthalmology


Hello, I’m glad to hear that everything is fine.
Wishing you peace and good health.
Sincerely, Dr.
Tsai Wen-Yuan, Director of the Department of Ophthalmology, Taoyuan General Hospital, Ministry of Health and Welfare.

Reply Date: 2018/06/07

More Info


When considering whether to get tested for color vision deficiency, it's important to reflect on your experiences and the results of previous tests. From what you've described, it seems that you have had mixed results in color vision tests, but overall, you have passed most of them, including a recent driving test. This suggests that your color vision is likely within normal limits.

Color vision deficiency, commonly referred to as color blindness, can manifest in various forms, ranging from mild difficulties in distinguishing certain colors to complete inability to perceive color. The most common type is red-green color blindness, which affects a significant portion of the male population. However, many individuals with color vision deficiency can still function normally in everyday life, especially if their condition is mild.

Your concerns about having difficulty with certain color tests may stem from several factors. First, it's entirely normal for anyone to occasionally struggle with visual tasks, especially if they are tired, stressed, or if the lighting conditions are not optimal. If you found a particular test challenging, it could be due to the quality of the test materials, such as the age or condition of the printed images. Older test plates may fade or become less distinct, making it harder to discern the numbers or patterns.

Additionally, your experience of seeing some images more clearly than others could be attributed to the specific colors used in those images. Some colors may naturally be more difficult for you to distinguish based on your unique visual perception. This does not necessarily indicate a deficiency but rather reflects the variability in human color perception.

If you are still feeling uncertain about your color vision, it may be beneficial to undergo a formal color vision test conducted by an eye care professional. These tests can provide a more comprehensive assessment of your color vision capabilities and help clarify any doubts you may have. Tests such as the Ishihara plates or the Farnsworth-Munsell 100 Hue Test are commonly used to evaluate color discrimination abilities.

In summary, while your past experiences and test results suggest that you likely do not have a significant color vision deficiency, it is understandable to have lingering doubts. If you continue to feel uneasy, seeking a professional evaluation can provide peace of mind. Remember that color vision deficiencies are quite common, and many people lead successful lives without being hindered by their condition. If you have aspirations in fields like art, there are many ways to adapt and succeed, even with color vision challenges.

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