The medical term describing the inability to distinguish certain colors is __________ . This condition is commonly known as color blindness.

monochromatism

Fluorescein __________ is a radiographic study of the blood vessels in the retina of the eye following the intravenous injection of a fluorescein dye as a contrast medium.

angiography

The flow of pus from the ear is known as __________ .

otopyorrhea

The __________ of the eyes are the structures outside the eyeball, and these include the orbit, eye muscles, eyelids, eyelashes, conjunctiva, and lacrimal apparatus.

adnexa

The bony cavity of the skull that contains and protects the eyeball and its associated muscles, blood vessels, and nerves is known as the __________ , or the eye socket.

orbit

The term __________ describes the drooping of the upper eyelid that is usually caused by paralysis. This condition is also known as ptosis.

blepharoptosis

The __________ is a vertical fold of skin on either side of the nose.

epicanthus

The sensitive innermost layer that lines the posterior segment of the eye is known as the __________ . This structure receives nerve impulses and transmits them to the brain.

retina

The condition in which the pupils are unequal in size is known as __________ .

anisocoria

The term __________ describes a group of diseases characterized by increased intraocular pressure that causes damage to the retinal nerve fibers and the optic nerve.

glaucoma

The __________ membrane, which is also known as the eardrum, is located between the outer and middle ear.

tympanic

The auditory __________ are three small bones located within the middle ear.

ossicles

The condition known as __________ is an inflammation of the lacrimal gland that can be caused by a bacterial, viral, or fungal infection.

dacryoadenitis

The sense of whirling, dizziness, and the loss of balance, often combined with nausea and vomiting, is known as __________ .

vertigo

The condition known as __________ is an inflammation of the conjunctiva that is usually caused by an infection or allergy. This condition is commonly known as pinkeye.

conjunctivitis

The gradual loss of sensorineural hearing that occurs as the body ages is called __________ .

presbycusis

A/An __________ is the unit of measurement of a lens's refractive power.

diopter

The term __________ describes the turning inward of the edge of an eyelid.

entropion

Retinitis __________ is a progressive degeneration of the retina that affects night and peripheral vision.

pigmentosa

The term __________ describes the condition of common changes in the eyes that occur with aging.

presbyopia