A pterygium is a wing-shaped fibrovascular connective tissue that grows from conjunctiva (a clear membrane that covers the white of the eye and the inner eyelids) over the cornea. Sometimes referred to as a "Texas cataract" it is seen in individuals who spend time outdoors such as farmers, fisherman and skiers. It is felt that exposure to sun, wind, and ultraviolet light promotes growth of this tissue. Conservative treatment includes artificial tears and wearing sunglasses. If vision is affected, the tissue can be surgically removed.
Keratitis is a nonspecific term meaning inflammation of the cornea.
Treatment of keratitis depends on the cause but usually involves antibiotic and/or steroid eye drops. Occasionally systemic treatment with an oral medication is required as well.