Some glaucoma medicines will darken the iris color.
Kohl is an ancient eye cosmetic that is widely used in the Middle East, South Asia and Africa. It is traditionally made by grinding galena and other ingredients. Its main application is to darken and contour the eyes.
which pigment do we now call kohl- a copper ore or galena, a gray-black eye paint
The retina is a portion of the back of the eye. Sometimes there is uneven pigmentation. It is nothing to worry about medically.
brown is a dominant allele in a blond-brown gene, if you have that allele you'll turn out brunette. Some believe that kids will have lighter hair at birth but which will darken as it's exposed to sunlight which stimulates the chemicals needed for pigment (forgot name of said pigment, but see wikipedia, hair color). This is supported mostly because that's what eye color does- exposure to sunlight stimulates production of pigment in the irises.
Yes. Eye color is caused by the amount and type of pigment in the iris of the eye.
rhodospin
less pigment
charcoal
pigment used to make pain is NOT SAFE for the eye area! they are two different things, because pigments meant for the eye have been tested as safe for that area.
The layer in the eye that contains dark pigment to absorb extra light and keep the inside of the eye dark is the choroid layer. The melanin pigment in this layer helps prevent light from scattering inside the eye, allowing for better vision and reducing glare.
Melanin. The amount and type of pigment in the iris of the eye gives the eye it's color.
Eye pigment is important because it helps protect the eyes from harmful UV rays and helps regulate the amount of light that enters the eye. It also can enhance vision by reducing glare and increasing contrast sensitivity. Additionally, eye pigment can give color to the iris, contributing to the variety of eye colors seen in humans.