Color blindness means you’re unable to distinguish different colors. Not actually blind, just deficient in the range of hues you perceive or perhaps not see color at all.
To visualize color, your eyes have three specialized cells in your retina, known as red, blue and green cones. Any deficiency in these cones will result in abnormal color vision. There are three basic variations of color blindness:
- red/green blindness ~ most common deficiency
- blue color blindness ~ inability to distinguish blue & yellow
- achromatopsia ~ totally blind to any colors, see in shades of grey ~ very rare
Those with a total loss of color vision often have poor visual acuity and may experience photophobia. And the majority of those with some blindness of color are males.
Most color blindness is caused by a genetic issue. Yet, it can be acquired from a chronic health condition, like:
- liver disease
- diabetes mellitus
- multiple sclerosis
- sickle cell anemia
- retinitis pigmentosa
- Parkinson’s disease
- Alzheimer’s disease
- macular degeneration
Sometimes, taking of a medication can cause you to encounter a color deficiency as well, for example:
- anti TB drugs
- high blood pressure meds,
- hydroxychloroquine ~ treats malaria, lupus, rheumatoid arthritis
Loss of color vision can be caused by chemicals too, such as:
Occasionally, your capacity to tell colors changes over age 60.
Symptoms of color blindness do vary, but may include:
- unable to correctly identify colors
- trouble seeing brightness of colors
- can’t tell the difference between shades of same, similar colors
Many may not even realize they are color blind because their symptoms are so mild.
Color vision deficiency is generally tested for during an eye exam. There are several tests available to identify color blind problems.
The most common color vision test used is composed of various colored dots and a normally visioned individual can clearly see a number formed by some of the dots. If you’re blind to any of the test colors, then distinguishing the number will be difficult.
Inherited color blindness is incurable. But most color vision deficient folks compensate for their abnormality by relying on other clues. Acquired color deficiency is usually permanent, yet some improve along with health condition improvement of the causer .
Testing for color blindness may give you a dressage edge once you discover which color you are blind to.