Thyroid Affects Color Vision

What part does the thyroid gland have in vision? Thyroid hormone is crucially involved in controlling which visual pigment is produced in the cones. Previously, it was assumed that the colour sensitivity of the cones is fixed in the adult retina. Resea…

What Is A Stye? What Is Hordeolum?

A stye, also known as hordeolum, is a small collection of pus (abscess) on the eyelid. In most cases, the infection is caused by the staphylococcus bacteria. Often the lump is red and painful and looks like a boil or pimple. Although most styes form on…