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Anterior Segment Disease > Corneal Infections and Hypersensitivities > Flashcards

Corneal Infections and Hypersensitivities Flashcards

1
Q

Acanthamoeba Keratitis Cause

A

CL rinsed with tap water

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2
Q

Symptoms of Acanthamoeba Keratitis

A

pain worse than clinical appearance

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3
Q

Signs of Acanthamoeba Keratitis

A

grayish irregular corneal surface- infiltrates
stromal opacification/ vascularization
corneal melt

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4
Q

Diagnosis of Acanthamoeba Keratitis

A

consider when pain worse than appearance and when there is a limited response to antibiotics

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5
Q

Tx of Acanthamoeba Keratitis

A

debridement
topical amoebicides
referal to K specialist

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6
Q

Onchocerciasis Keratitis Cause

A

worm from black fly bite

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7
Q

Marginal Keratitis

A

Hypersensitivity to Staph exotoxins and cell wall proteins

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8
Q

Signs of Marginal Keratitis

A

peripheral/ marginal K infiltrates separated from limbus by clear zone
nearby conjunctival hyperemia

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9
Q

Tx for Marginal Keratitis

A

self resolves
treat associated blepharitis
topical steroid +/- antibiotic

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10
Q

Phlyctenular Keratitis

A

Nodular inflammation of cornea resulting from hypersensitivity rxn to foreign antigen- S. aureus, M. tuberculosis…..

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11
Q

Demographics for Phlyctenular Keratitis

A

6mo to 16 yrs

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12
Q

Signs of Phlyctenular Keratitis

A

white limbal nodule that can extend further onto cornea

intense nearby conjunctival hyperemia

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13
Q

Tx for Phlyctenular Keratitis

A

spontaneously resolve, leaving scar, vascularization, thinning; but can ulcer
topical steroids
treat blepharitis

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14
Q

Rosacea

A

sun exposed skin characterized by telangectasia, papule formation, rhinophyma, facial flushing

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15
Q

Signs of Ocular Rosacea

A 
marginal telangectasia of lids and MGD
conjunctival inflammation
punctate K epithelial erosions inferiorly
marginal keratitis
K thinning
K scarring/ NV
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16
Q

Mx of Ocular Rosacea

A

lid hygiene and artificial tears
anti-inflammatory meds- oral tetracycline
surgery in late stages

Anterior Segment Disease (19 decks)

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