Color Blindness
What is Color Blindness?
Color blindness is a condition in which a person cannot distinguish color properly. There are several variations of color blindness and each one relates back to a problem with the functionality of the cells inside the retina that deal with processing light sensitivity. The rod cells are activated by low light while the cone cells are activated by daylight.
The pigments inside each of the 3 cone cells react and respond differently as each absorbs light. Each pigment processes a different wavelength: short, medium and long. In a normal eye, this interaction and overlap between the cones, pigments and the amount of light each absorbs as the eye processes various images is what makes it possible to create the wide spectrum of color that most individuals are able to view.
Routine eye exams are important even for people who are not experiencing eye trouble. How often a person needs an eye exam depends on a number of factors including age, overall health and whether or not eye disorders run in the family. .. 
