Chapter 17a Pathology Flashcards
(21 cards)
astigmatism
defective curvature of the cornea or lens of the eye
hyperopia (hypermetropia)
farsightedness
eyeball is too short (front to back) or lens refraction is too weak
myopia
nearsightedness
eyeball is too long (front to back) or lens refraction too strong
presbyopia
impairment of vision as a result of old age
cataract
clouding of the lens, causing decreased vision
chalazion
small, hard, cystic mass (granuloma) on the eyelid
diabetic retinopathy
disease of the retina caused by diabetes mellitus
glaucoma
increased intraocular pressure results in damage to the retina and optic nerve with loss of vision
blepharitis
inflammation of eyelid
chalazion
granuloma formed around an inflamed sebaceous gland
dacryocystitis
blockage, inflammation, and infection of a nasolacrimal duct and lacrimal sac, causing redness and swelling in the region between the nose and the lower lid
ectropion
outward sagging and eversion of the eyelid, leading to improper lacrimation and corneal drying and ulceration
entropion
inversion of the eyelid, causing the lashes to rub against the eye; corneal abrasion may result
hordeolum (stye)
small, superficial white nodule along lid margin due to infection of a sebaceous gland
ptosis
drooping of upper lid margin from neuromuscular problems or trauma
xanthelasma
raised yellowish plaque on eyelid caused by lipid disorder
hordeolum (stye or sty)
localized, purulent, inflammatory staphylococcal infection of a sebacious oil-producing gland in the eyelid
macular degeneration
progressive damage to the macula of the retina
nystagmus
repetitive rhythmic movements of one or both eyes
retinal detachment
two layers of the retina separate from each other
strabismus
abnormal deviation of the eye
