The appendages or accessory structures of an organ. In the eye, these are the structures outside the eyeball, including the orbit, eye muscles, eyelids, eyelashes, conjunctiva, and lacrimal apparatus.
Dimness of vision or the partial loss of sight, especially in one eye, without detectable disease of the eye.
Any error of refraction in which images do not focus properly on the retina.
A condition in which the pupils are unequal in size.
A condition in which the eye does not focus properly because of uneven curvatures of the cornea.
The use of an audiometer to measure hearing acuity.
The loss of transparency of the lens of the eye that causes a progressive loss of visual clarity.
A nodule or cyst, usually on the upper eyelid, caused by obstruction in a sebaceous gland.
An electronic device that bypasses the damaged portions of the ear and directly stimulates the auditory nerve.
Inflammation of the conjunctiva, usually caused by an infection or allergy; also known as pinkeye.
An inflammation of the lacrimal gland that can be a bacterial, viral, or fungal infection.
The perception of two images of a single object; also known as double vision.
The eversion (turning outward) of the edge of an eyelid.
The normal relationship between the refractive power of the eye and the shape of the eye that that enables light rays to focus correctly on the retina.
Strabismus characterized by an inward deviation of one eye or both eyes; also known as cross-eyes.
Strabismus characterized by the outward deviation of one eye relative to the other; also known as walleye.
A radiographic study of the blood vessels in the retina of the eye following the intravenous injection of a fluorescein dye that acts as a contrast medium.
A group of eye diseases characterized by increased intraocular pressure (IOP) that causes damage to the optic nerve and retinal nerve fibers.
Blindness in one-half of the visual field.
A pus-filled and often painful lesion on the eyelid resulting from an infection in a sebaceous gland; also known as a stye.
A vision defect in which light rays focus beyond the retina; also known as farsightedness.
A contagious inflammation associated with a middle-ear infection that causes painful blisters on the eardrum.
The surgical removal of a portion of the iris tissue.
Inflammation of the uvea affecting primarily structures in the front of the eye.
Inflammation of the cornea.
The surgical removal of all or a portion of the labyrinth of the inner ear.
Treatment of open-angle glaucoma in which a laser is used to create an opening in the trabecular meshwork to allow fluid to drain properly.
The surgical removal of mastoid cells.
The dilation of the pupil.
A vision defect in which light rays focus in front of the retina; also known as nearsightedness.
A small surgical incision into the eardrum to relieve pressure from excess pus or fluid or to create an opening for the placement of ear tubes.
A condition in which an individual with normal daytime vision has difficulty seeing at night; also known as night blindness.
Involuntary, constant, rhythmic movement of the eyeball.
The visual examination of the fundus (back part) of the eye with an ophthalmoscope; also known as funduscopy.
A specialist who holds a Doctor of Optometry degree and provides primary eye care, including diagnosing eye diseases and conditions and measuring the accuracy of vision to determine if corrective lenses are needed.
Inflammation of the middle ear.
A fungal infection of the external auditory canal; also known as swimmer's ear.
The flow of pus from the ear.
Any discharge from the ear.
Ankylosis of the bones of the middle ear, resulting in a conductive hearing loss.
Swelling and inflammation of the optic nerve at the point of entrance into the eye through the optic disk; also known as choked disk.
Swelling of the tissues surrounding the eye or eyes.
Excessive sensitivity to light.
A gradual sensorineural hearing loss that occurs as the body ages.
Decline of near vision that occurs with age as the lens becomes less flexible and the muscles of the ciliary body become weaker.
Drooping of the upper eyelid that is usually due to paralysis.
A surgical procedure to treat myopia.
Treatment to reattach the detached area in a retinal detachment.
Inflammation of the sclera of the eye.
sensorineural hearing loss
Deafness that develops when the auditory nerve or hair cells in the inner ear are damaged.
The surgical removal of part of the stapes bone and its replacement with a small prosthetic device.
A disorder in which the eyes point in different directions or are not aligned correctly because the eye muscles are unable to focus.
The partial or complete suturing together of the upper and lower eyelids.
A ringing, buzzing, or roaring sound in one or both ears.
The part of a routine eye examination in which intraocular pressure (IOP) is measured.
The use of air pressure in the ear canal to test for disorders of the middle ear.
A sense of whirling, dizziness, and the loss of balance, often combined with nausea and vomiting.
The removal of the vitreous fluid of the posterior chamber of the eye and its replacement with a clear solution.
Drying of the eye surfaces, including the conjunctiva; also known as dry eye.
The inversion (turning inward) of the edge of an eyelid.