Color blindness is more accurately referred to as color vision deficiency, because it is very rare for individuals to be able to see no color at all, to be truly color blind. Most cases of color blindness occur because of a sex-linked gene located...
One study of optic neuritis found that more than nine out of 10 optic neuritis sufferers experienced mild to severe pain in the eye and cranium. In almost four out of 10 of these cases, the pain preceded other symptoms, such as loss of vision or...
Athletes can take a test called ImPACT, or Immediate Post-concussion Assessment and Cognitive Testing, to establish a baseline of cognitive ability, which you can use as a guideline in assessing recovery from a concussion. A concussion is a brain...
In order to protect your eye health, it is important to have a complete eye examination regularly. An eye examination can be performed by either an optometrist or an ophthalmologist and includes a number of tests that measure vision, eye...
Color blindness affects one percent of females and eight percent of males, according to Dr. Claire McCarthy in her article "Color-Blind Tests for Kids," published by the website Parenting. When a child is color blind, there is a disruption in his...
For children who are color-blind, red, orange, yellow and green may be different names for what they perceive as the same color. Children who are color-blind can see color, just not the same colors as people with normal vision. The American...
Color blindness in children may present difficulties in school, particularly in the early grades, when colors and color-coding are frequently used in learning. Children who are color blind lack a type of "cone cell" in the retina of the eye that...
There are various conditions that can make it hard to distinguish the difference between certain colors. In some cases there is a complete loss of color vision, called color blindness. In other cases it becomes difficult to tell the difference...
Color blindness is a visual deficiency that is characterized by the inability to see certain colors. To understand how this condition affects the eye, it is necessary to understand how the eye perceives color. The eye operates like a camera with...
People with color blindness aren't blind in any way--they just have trouble distinguishing between certain color groups. Most color blind people do see colors---they just don't see them in the same way that other people see them. Color blind...
Visual disorders are the result of an interruption of the processing of images through the cornea to the retina and optic nerve and then to the brain for interpretation. Congenital defects, injury and age affect the ability to see clearly. Eye...
In order for us to see in color, light is absorbed by visual pigments in the eye called photoreceptors. Cones, which can be one of three different pigments, are the photoreceptors that are responsible for color vision. Color is perceived when the...
Some symptoms, such as blurred vision, can indicate a constellation of potential eye disorders. For instance, blurry vision might indicate astigmatism, farsightedness, nearsightedness, cataracts or other less common and potentially more dangerous...
Color blindness is the inability to see certain colors and predominantly affects males. Get professional tips and advice on living with and testing for color blindness in this video.
