Refractive Error (Myopia, Hyperopia, Astigmatism, Presbyopia)
Refractive Error is the general term meaning that your eyes do not see clearly. Myopia, also called nearsightedness, means that close objects are more clear than distance objects. Hyperopia, also called farsightedness, means that close objects are more blurry than distance objects. Astigmatism means that vision is distorted at all distances, near and far. Presbyopia is the normal aging process, meaning that after 40 years old, the eye can no longer focus for things at a close distance.
Amblyopia (Lazy Eye)
Lazy eye is a misnomer because it is truly a problem with the brain as opposed to the eye. Amblyopia means that the eye has decreased vision because the brain never developed for good vision in that eye. This typically happens when an eye has significant prescription, a strabismus, or a congenital defect such as a cataract.
Strabismus (Eye Turn)
Strabismus is an eye turn, when one eye is aligned and the other eye is pointing either in (called esotropia) or out (called exotropia). This is something that children are born with. Sometimes it can be corrected with glasses, but other times it may need to be corrected with surgery.
Cataracts are a normal age related clouding of the lens in the eye. Everybody eventually gets cataracts, although they occur at different times and grow at a different rate. Cataracts may progress to the point where they cause blurry vision, and at that point people often decide to get them removed.
Dry eye is just what it sounds like, eyes that are dry. Dry eyes can have a host of symptoms however, including sandy and gritty eyes, itching, pain, watering, redness, and light sensitivity. There are many causes of dry eye, including meibomian gland dysfunction, contact lenses, allergies, medications and underlying systematic disease.
Conjunctivitis (Pink Eye)
The term "pink eye" can include many types of conjunctivitis, including bacterial, viral and allergic. All of these appear the same, which is redness of the white outermost layer of the eye, called the conjunctiva. Bacterial and viral pink eye are contagious, whereas allergic pink eye is not. It is important with any pink eye to be seen by an eye doctor to determine which kind of pink eye it is and to see if treatment is needed. Also, it is important to wash hands to prevent spread of pink eye.
Diabetic Eye Disease