ophthalmic vein One of the paired veins that drain the orbital cavity that contains the eye. The superior ophthalmic vein arises at the inner angle of the orbit and follows the course of the ophthalmic artery into the cavernous sinus, a large channel of venous blood. The inferior ophthalmic vein arises from a venous network…
ophthalmic artery The artery that supplies blood to the eye and adjacent structures of the face. It arises from the internal carotid artery, which courses up from deep within the front of the neck. See also artery.
ophthalmic Pertaining to the eye. For example, an ophthalmic ointment is designed for the eye.
ophthalmia, sympathetic See sympathetic ophthalmia.
ophthalmia Severe inflammation of the eye. Also known as ophthalmitis.
operation, Macewen See Macewen operation.
operation, Blalock-Taussig See Blalock-Taussig operation.
operation In medicine, a surgical procedure. Many operations are named after persons. They range from A to Z, from the Abbe operation (on the lip) to the Ziegler operation (on the eye).
operating room A facility that is equipped for performing surgery. Abbreviated OR.
opening, vaginal The opening to the muscular canal that extends from the cervix to the outside of the body. In medicine, the vaginal opening is called the vestibule of the vagina.
open-angle glaucoma Glaucoma in which the aqueous (fluid) that flows through the pupil into the anterior (front) chamber of the eye cannot get through a filtration system called the trabecular meshwork into the drainage canals, causing pressure to build up within the eye which can damage the optic nerve and impair vision. Open-angle glaucoma is…
open wound An injury that is exposed because of broken skin. An open wound is at high risk for infection.