Chapter 58 Flashcards
What is entropion?
Turning in of the lower eyelid
Define enucleation.
Removal of the eyeball and part of the optic nerve
What does evisceration entail?
Removal of the intraocular contents through a corneal or scleral incision; the optic nerve, sclera, extraocular muscles, and sometimes the cornea are left intact
What is exenteration?
Surgical removal of the entire contents of the orbit, surrounding soft tissue, and most or all of the eyelids
What is exophthalmos?
Abnormal protrusion of the eyeball (synonym: proptosis)
Define glaucoma.
Group of conditions characterized by increased intraocular pressure
What does hyperemia refer to?
Red eyes resulting from dilation of the vasculature of the conjunctiva
What is hyperopia?
Farsightedness; light rays focus behind the retina
Define hyphema.
Blood in the anterior chamber
What is hypopyon?
Collection of inflammatory cells in the anterior chamber of the eye
What does injection refer to in ocular terms?
Congestion of blood vessels
Define keratoconus.
Cone-shaped deformity of the cornea
What is myopia?
Nearsightedness; light rays focus in front of the retina
What does neovascularization mean?
Growth of abnormal new blood vessels
Define nystagmus.
Involuntary oscillation of the eyeball
What is papilledema?
Swelling of the optic disc usually due to increased intracranial pressure
What does photophobia refer to?
Ocular pain on exposure to light
What is presbyopia?
The loss of accommodative power in the lens due to age
Define ptosis.
Drooping eyelid
What is refraction in the context of eye care?
Determination of the refractive errors of the eye for the purpose of vision correction
What are scotomas?
Blind or partially blind areas in the visual field
What is sympathetic ophthalmia?
An inflammatory condition created in the fellow eye by the affected eye
Define trachoma.
An infectious disease caused by the bacterium Chlamydia trachomatis - the leading cause of preventable blindness in the world
What is trichiasis?
Turning in of the eyelashes
What is vitreous humor?
Transparent, colorless gelatinous material that fills the vitreous chamber behind the lens
Anterior chamber
Aqueous-containing space in the eye between the posterior cornea and the anterior iris and pupil
Aqueous humor
Transparent, nutrient containing fluid that fills the anterior and posterior chambers of the eye
Astigmatism
Refractive error due to an integrity in the curvature of the cornea
Binocular vision
Normal ability of both eyes to focus on one object infuse the two images into one
Cataract
Progressive opacity of the lens of the eye
Chemosis
Edema of the conjunctiva
Diplopia
Seeing one object as two
Ectropion
Turning of the lower eyelid
Emmetropia
Normal refractive condition, resulting in clear focus on retina, no optical defects
Endophthalmitis
Intraocular infection
