Eye disorders Flashcards
malposition of lid AWAY from eyeball–typically lower lid involved
ectropion
etiology of ectropion (5)
- involution–change in lid laxity
- cicatricial–scar
- paralytic–CN VII palsy
- Mechanical–space-occupying lesion
- Infection–HSV
Inward turning eyelid
Entropion
entropion etiology (5)
- cicatricial
- chemical burn
- trauma
- infection HSV
- laxity of lid
lid disorder that is chronic or acute; anterior or posterior, or both
blepharitis–usually Staph
Pathophys of blepharitis
- infections or seborrheic (Anterior blepharitis involves skin of external eyelid, eyelashes, and associated glands.
- inflammation of meibomian glands –secondary to seborrhea or acne rosacea
- infections (staph, demodex)
- Seborrheic (isolated to lid margins–ant or post)
- Acne rosacea–POSTERIOR blepharitis
burning, itching, redness, and mildly decreased vision
Seborrheic blepharitis
demodex Tx
metronidozole, tea-tree oil
chronic inflammatory skin disease which affects the MIDLINE skin of face and upper chest – persistent erythema, telangiectasis, papules, pustules, and sevaceous gland hypertrophy
Acne Rosacea – may be from Demodex
Tx of acne rasacea
- avoid triggers
- metronidazole gel to lids
- doxycycline
common acute infections abscess typically caused by staph.
hordeolum (stye)
types of Stye
- internal hordeolum–small staph abscess of meibomian glands
- external hordeolum–acute staph abscess of a lash follicle–associated w/ Zeis or Moll glands
TX for Stye and chalazion
- hygiene
- warm compress
- I&D if surrounding cellulitis
a form of blepharitis that is a localized nontender sterile granulomatous inflammation w/in a MEIBOMIAN gland
Chalazion
conjunctivitis usually always _____ etiology
viral (^adenovirus or HSV)
pink eye usually
acute viral conjunctivitis
bacterial conjunctivitis usually from (4)
- Staph aureus
- staph epidermidis
- Strep pneumoniae
- Haemophilus influenzae
H&P bacterial conjunctivitis (5)
- redness
- foreign body sensation
- purulent discharge
- itchy
- more likely unilateral
flat or elevated, cream-colored, white, or chalky lesion of conjunctiva adjacent to the limbus and w/in the palpebral fissure
Pinguecula
triangular fibrovascular subepithelial ingrowth of degenerative bulbar conjunctival tissue over the limbus ONTO CORNEA
Pterygium