Pathology of Eyes and Ears Flashcards
Combines to focus light on the retina
- retina
- sclera
- choroid
- cornea
Three concentric tunics of the eyeball
- fibrous
- vascular
- nervous
3 refractive media of the eye
- aqueous humor
- lens
- vitreous
Adnexa of the eye
- Eyelids
- Conjunctiva
- Nictitating membrane
absence of the globe
anophthalmia
abnormally small globe
microphthalmia
developmental anomaly char. by presence of single median eye in a single median orbital fossa
cyclopia
congenital absence of a portion of an ocular tissue
coloboma
inflammation of the eye
Ophthalmitis
excessively large cornea
megalocornea
small than normal cornea
microcornea
piece of skin on the cornea, conjunctiva, or both
dermoid
keratoconjunctivitis sicca
dry eye
fibrovascular tissue invades cornea beneath epithelium
Pannus
inflammation of the cornea
keratitis
Outcome of Corneal ulceration
- scars
- keratectasia
- descemetocele
- glaucoma and phthisis bulbi
Infectious Keratitis etiologic agent in sheep
Ricketssial conjunctiva
inflammation involving the iris, ciliary body and choroid
uveitis
What are the sequels of uveal inflammation?
- posterior and anterior synechiae
- blockage of filtration meshwork by synechia
high intraocular fluid pressure, optic disc lesion and eventual loss of vision
Glaucoma
absence of lense
aphakia
opacity of the crystalline lens and its capsule
cataract
dislocation or displacement of the lens
Luxation of the lens
transparent avascular gel filling the globe posterior to the lens
Vitreous body
accumulation of fluids, exudate, blood or neoplastic cells within the potential space
retinal detachment
consists of axons of the ganglion cells of retina and is white fiber tract of the CNS, extending from the eyeball to the optic chiasma
optic nerve
swelling of the nerve head
papilledema (disc edema)
inflammation of the optic nerve
optic neuritis
inflammation of the conjunctiva
conjunctivitis
a well vascularized CT between bulbar conjunctiva and sclera
Episclera
inflammation of the eyelids
blepharitis