Zeltzer X Chrom Soft Lens

A. The most accepted theory is that missing or defective nerve fibers in the cones of the retina cause color defects. However, the mechanism is not completely understood.

A. Not necessarily. It is an inherited, sex-linked characteristic. The female is the carrier. The female offspring of a color-deficient father will most likely transfer this genetic abnormality to half her sons. Some retinal injuries or diseases can also cause color deficiency.

A. A condition which some color-deficient persons appear to have; namely, a lack of interest in color.

A. Yes. In many instances, he may not see them at all; for example, strawberries in the field or ripe apples on a tree. When his color deficiency is aided, he can see such objects.

A. A color-deficient person may find it difficult to distinguish between red and green; between red, brown and gray; between green, brown and gray; between green, gray and certain blues; between red and black; and between light blue and purple. Also, he is often unable to distinguish between shades of the same color. Thus, he may confuse a cool yellow with a warm yellow. To a color-deficient person, pink can look insipid and even gray. Further, he might see a dull yellow as orange or light green. In many instances, the only colors that a color-deficient person commonly recognizes are blue and yellow. Further, pastel shades of all colors are difficult to distinguish.

A. Yes. Many occupations assume a person's ability to identify by color. This is true in the electronics industry, where color-coded components are a standard aspect of assembly. Color identification is also required in the fields of cosmetics, medicine, printing, agriculture, chemical analysis, textiles, plastics, photography, and art. There is practically no profession or trade that does not inherently use color as a means of identification.

A. It is a belief of those who have studied this problem that there is indeed some danger in having a colorblind person driving a vehicle. In some countries, it is difficult to get a driver's license. There are also restrictions against commercial driving by color-blind persons in many areas of the United States.

A. Yes. In marine navigation, aviation, and railroading, color signals are a vital part of the traffic-control system. A person who is color deficient has no way to identify these colored signals; this makes it extremely dangerous to permit him to navigate a boat plane or locomotive. In view of the great increase and complexity of colored signals and lights on highways, it can be hazardous for a color-deficient person to drive an automobile unless his color deficiency can be corrected.

A. Hunting is a sport in which there are approximately 2,300 accidental shootings each year. In the typical forest or underbrush, a color-deficient person could easily mistake a fellow hunter for the animal or bird being hunted.

A. Yes. The ZELTZER X-CHROM™ soft lens can help most color-deficient people.