Ophthalmic Flashcards
(46 cards)
define proptosis
forward displacement of the eyes like that seen in Graves disease
what are the three main layers of they eye starting from superficial to deep
1.) sclera (white)
2.) choroid (vascular)
3.) retina
what does OD mean in terms of the eye
oculus dexter - right eye
what does OS mean in terms of the eye
oculus sinister - left eye
what is the main structure used to help orient the eye
inferior oblique muscle - found on the inferior lateral aspect of the posterior eye
what are the three most common types of primary, vascular tumors of the orbit
1.) capillary hemangioma
2.) lymphangioma
3.) cavernous hemangioma
what is blepharitis
chronic inflammation and blockage of sebaceous gland at eyelid margin
what is chalazion
blepharitis that causes lipid movement into the surrounding tissue, thus provoking a granulomatous response
what is the most common malignancy of the eyelid
basal cell carcinoma
what are the 5 main zones of the conjunctiva
1.) superior conjunctival fornix
2.) inferior conjunctival fornix
3.) bulbar conjunctiva
4.) palpebral conjunctiva
5.) limbus
which condition can cause significant conjunctival scarring
long standing, untreated chlamydia trachomamtic (trachoma)
what is a pterygium
fibrous bands that grow over cornea who’s origin is likely inflammatory
what is a pinguecula
yellow submucosal elevations of conjunctiva caused by actinic damage
can become squamous cell carcinoma
squamous and melanocytic neoplasms develop where in the eye
the limbus
what is the most common conjunctival lesion
conjunctival nevus
the sclera may appear blue in which three conditions:
1.) high intraocular pressure
2.) osteogenesis imperfecta
3.) recurrent scleritis
define myopia
nearsightedness due to a long eyeball
define hyperopia
farsightedness due to a short eyeball
what is one of the most common eye injuries
abrasions
which two infections are known to cause corneal ulceration
1.) herpes simplex
2.) zoster
what are the two main types of corneal degenerations
1.) calcific band keratopathy
2.) actinic band keratopathy
what is calcific band keratopathy
deposition of calcium in Bowman’s layer of eye
what is actinic band keratopathy
aggregates on eyeball due to chronic high level UV exposure
what is a common dystrophy of the eye
keratoconus - thinning, cone shaped eyeball