The Ishihahra® Color Blindness Test is a self-assessment tool to measure type and extent of color vision deficiency. This test is for informational purposes only. If you believe you may have a color vision deficiency please consult an eye care professional.Results may vary depending on many factors including the type and quality of your device display, and operating system configuration. Before starting the test, turn off any software that may alter the screen color. Blue light filtering software (such as Night Shift and f.lux) may cause the test to return a "tritan" classification. Taking this test with colored glasses including "color blind glasses" may cause the test to return an erroneous classification. To ensure accuracy of the result, remove any filtering eyewear or lenses.

There are four main types: Red-Green, Blue-Yellow, and Full (Monochromacy). Each color vision deficiency results from specific eye defects or abnormalities that affect how an individual sees color. For example, individuals with the Red-Green type are less sensitive to color variations in the spectrum's red and green regions. Individuals with the Blue-Yellow type may not distinguish between hues such as cyan or blue-yellow. And people with Full (Monochromacy) Type have difficulty seeing any color.

There are several different types, but the most common type is caused by an altered or absent color of Photopsin pigment in the eyes. It will also be caused by other conditions that affect the eyes, such as cataracts or macular degeneration. Most of all, it is hereditary but can also be acquired through illness or injury. It is relatively common, affecting up to 8% of men and 0.5% of women worldwide. While it is not a severe condition, it can impact a person's ability to participate in certain activities, such as driving or identifying colors in a work environment. There are several ways to adapt to color-blindness, including color filters and special glasses by consulting a doctor.

Driving is a most difficult skill, allowing people to navigate the roads safely and access work, school, and other destinations. However, not everyone has this ability. Some people suffer from color blindness, making it difficult to differentiate some colors and combinations. Many have wondered whether color-blind drivers are safe to drive on the road, but this question depends on their particular type of color blindness. For instance, color blindness can be detected with a simple online test. Regardless of the cause, all color blind drivers can benefit from taking extra care behind the wheel and being especially careful by consulting to doctor and taking Treatment like glasses or lenses while driving.

Test results may vary if a person uses different monitors, screens, or takes the test under different lighting conditions. Be sure that the brightness of your monitor, tablet or smartphone is set to high and retake the test on the same device to confirm results.