Evidence from opticians is that about 10% of the male population who have been tested have been found to have some kind of defect in their ability to distinguish between colors, but the percentage is much lower among females. In some cases the defect is caused by a defect in the function of the person's eye rods or cones of his retina, and in others a defect in the nerve cells in his brain. Full color blindness, where everything appears monochromatic is extremely rare, believed to affect less than 0.1% of humans.
Cystic Fibrosis 1/3300 children affected Duchenne Muscular Dystrophy 1/3600 boys affected (Color blindness is not fatal, BTW)
littering can cause a healthhazard as it contains a parasiticnematode that can cause blindness to small children
Most commonly, color blindness is diagnosed through the Ishihara Color Test. This consists of a set of plates, each displaying a circle of dots appearing randomized in color and size. Within each Ishihara plate is a number that should be perceptible to individuals with normal vision.The US Navy and US Army also allow testing with the Farnsworth Lantern Test, also known as FALANT. This test allows 30% of color deficient individuals, whose deficiency is not too severe, to pass.
you are allowed to have as many children as you want.
No one discovered "blindness" It has been with us since the first group of Humans walked the earth.
to many
over 3,000,000,000,000 children
The answer is blindness
1000,478,37289
Genetically, Labradors can be prone to blindness. They can see the color red, everything else is extremely muted colors, on a bright day, they see what would be about twilight to us.
There are 31.7% of obese children in America.
"They have as many children as we do." Or. "They have the same number of children as we do."