allaboutvision.com

loy9N TIL that there is a name for the sparkling lights or stars that you see after a cough or sneeze. They are referred to as Phosphenes.
E1pvd TIL that some contact lenses have a laser marking to help you determine if your contact is inside out. For example, one brand has a "123" laser marking near the edge of the lens.
yQDA8 TIL Glaucoma is almost always caused by too much pressure inside one or both eyes. People don’t typically experience symptoms until the optic nerve has already been damaged and glaucoma usually occurs later in life, but it can happen at any age