Hypothyroidism includes any medical condition that results in abnormally low thyroid hormone levels. Autoimmune disease, insufficient dietary iodine, surgery, inadequate stimulation of the thyroid gland and treatment for certain diseases can lead to hypothyroidism.

Photochromic eyeglass lenses darken when you wear them outdoors, removing the need for sunglasses or clip-ons. Color-changing lenses are available from many companies, though the technology behind the most popular brands is owned by Transitions Optical, Inc., according to Gary Heiting, O.D.

Pregnancy causes most parts of a woman’s body to change, and the eyes are no exception. Dry eye is a common pregnancy ailment that usually begins toward the end of the first trimester. It will usually continue throughout the pregnancy and possibly for a few months after the baby’s birth.

Eye exercises for esotropia are designed to strengthen and straighten out your eye or eyes that have been effected by esotropia. Esotropia, colloquially referred to as a lazy eye or crossed eye, causes your eye to squint in such a manner that it is turned inward or down.

Getting a contact stuck up under an eyelid or flat against the eye is a common occurrence among contact lens wearers. Lenses become stuck when eyes dry out or when you rub them and dislodge the lens from its seated position. The thin plastic can roll up and become stuck or just refuse to budge.

Being blind generally refers to a complete lack of functional vision. However, blindness involves varying levels of vision ability, sometimes under varying conditions. Vision is the result of light rays hitting the back of the eye, or retina, and then the optic nerve transmitting electrical signals to the brain.

Ischial bursitis, also known as ischiogluteal bursitis, is a condition that causes pain in the buttock region. The pain is from tissue damage and inflammation in the ischiogluteal bursa, which is a little sac filled with a lubricating fluid near the base of the pelvis.

Amblyopia, commonly known as "lazy eye," is a condition in which one eye works harder than the other to gather visual stimuli and transmit these stimuli to your brain.

Eye redness gives your eyes a bloodshot look, and this condition may stem from benign causes such as lack of sleep. You may have redness from eye conditions such as dry eye, infections or a broken blood vessel.

The lens of your eye is normally clear, allowing you to see without obstruction. A cataract is a clouding in the lens that hampers your vision. Cataracts can affect a small portion or a larger area of your eye, and are most often related to age, according to the National Eye Institute.

Genetics determines eye color, but the inheritance patterns are complex. Because of this complexity, children can have different eye colors than their parents. Iris eye color can change during a person's lifetime for several reasons.

Detecting eye problems in a 2-month-old infant can be difficult, since your baby can't tell you when something is wrong. However, some children are born with eye conditions or disorders, reports Eye Care America, and failure to detect these conditions can lead to deterioration of vision and possibly even blindness.