Military color blind test especially PAF, Navy || Color Blindness Test (1) || Test your self and see if you are fine or (God forbid) Color Blind.

 

Color blindness is a condition in which the ability to distinguish certain colors is normal. This means that a person suffering from color blindness has trouble seeing red, green, blue or a mixture of them. It is very rare that a person's ability to see color is lost (it is called monochromacy). Many people are that only black and white colors are seen to a person suffering from color blindness. This is a misconception. There are many different types and levels of color blindness.

The prevalence of color blindness in Pakistan  is 8% in men and only 0.5% in women.Generlay found in Male and female has less eye blindness. 

How do we see color?

The human eye sees color by stimulating the retina (membrane inside the eye) slightly. The retina is made up of rod and conc cells.

Rod Cells -

Rod cells surround the retina. It helps us see at night, but it cannot distinguish colors.

Cones Cells -

The const cells are located in the center of the retina, it does not help to see at night, but is able to perceive colors during the day time. Conc cells are divided into three types -

L-CON cells that feel red light.

M-con cells that feel green light.

S-con cells that feel blue light.

Color blindness can be diagnosed on its own. This is when the con cells that feel color cannot send signals to the brain. It usually occurs either due to family reasons or by diseases of the optic nerve or retina. This problem is associated with the X-chromosome and almost always occurs from a mother to her son.

Cause: 

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Color blindness can be caused by aging, eye problems (such as cataract, glaucoma), eye injuries, side effects of certain medicines. Color blindness due to family reasons lasts a lifetime. The color blindness of red-green colors is due to family reasons. This is the most common type of color blindness. (Read more - Symptoms of Glaucoma)

Tests:

There are many tests available to measure color blindness but the most commonly used test is the Ishara plate test. There is no cure for color blindness. However, people need special sets of lenses to feel the colors .

Some tests are givem below for checking colour blindness. 

In above diagram 74 is written. 

97 is written. 

2 is written. 

6 is written

Treatment:

Currently, there is no cure for color blindness. Colored filters or contact lenses are available that can be used in certain circumstances (to help enhance clear vision and to make it easier to identify colors. But many patients find them inconvenient).

Colored contact lenses

Color contact lenses can make some colors appear dim or bright and some colors can help with vision impairments. Some claim that wearing lenses in one eye helps in their vision and functioning. However, it is not that lenses actually help them see more color. Lenses can blur vision and also create other dangerous conditions.