Disorder of cornea & iris Flashcards

1
Q

Bacterial keratitis- Eti

A
  • Contact lens wear, trauma & surgery
  • Pseduomona aeruginosa, moraxella
  • Ophthal emergency
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2
Q

Bacterial keratitis- Sx

A
  • Hazy cornea with central access and adjacent tremble abscess
  • Assoc with hypopyon
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3
Q

Bacterial keratitis- Dx

A

Gram stain

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4
Q

Bacterial keratitis- Tx

A
  • Fluoroquinolone eye drops- levofloxacin, ofloxacin
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5
Q

Herpes simplex keratitis- Eti

A
  • Colonization of trigeminal ganglion

- Exacerbated by fever, sunlight, immunodeficiency

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6
Q

Herpes simplex keratitis- Sx

A
  • Dendritic, branching ulcer
  • Herpes sores around eyelids
  • Corneal opacity with recurrence
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7
Q

Herpes simplex keratitis- Dx

A
  • Flourescein & blue light examination
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8
Q

Herpes simplex keratitis- Tx

A
  • Debridement, topical antivirals
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9
Q

Herpes zoster opthalmicus- Eti

A
  • Trigeminal nerve

-

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10
Q

Herpes zoster opthalmicus- Sx

A
  • Malaise, fever, HA and periorbital burning
  • Vesicular, pustular & crusting rash
  • Conjunctivitis, keratitis, uveitis
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11
Q

Herpes zoster opthalmicus- Tx

A

Acyclovir- oral

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12
Q

Fungal keratitis- Eti

A
  • Corneal injury involving plan or agricultural setting

- Indolent

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13
Q

Fungal keratitis- Sx

A

Multiple stromal abscesses

  • Little epithelial loss
  • Intraocular infection common
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14
Q

Fungal keratitis- Dx

A

Fungi culture media

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15
Q

Fungal keratitis- Tx

A

Natamycin, amphotericin and voriconazole

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16
Q

Acanthamoeba keratitis- Eti

A
  • Contact lense wearers

- Amoeba in soil & fresh water habit

17
Q

Acanthamoeba keratitis- Sx

A
  • Severe pain
  • Perineural & ring infiltrates in corneal stroma
  • Risk of encysting
18
Q

Acanthamoeba keratitis- Dx

A
  • Confocal microscopy

- Culture

19
Q

Acanthamoeba keratitis- Tx

A

Topical biguanides

20
Q

Ultraviolet keratitis- Eti

A
  • Use of sunlamp or exposure to welding, skiing

- UV burn of cornea

21
Q

Ultraviolet keratitis- Sx

A

Agonizing pain & severe photophobia 6-12 hrs following exposure to light

22
Q

Ultraviolet keratitis- Dx

A
  • Slit lamp & flourescein

- Bilateral punctuate staining of both corneas

23
Q

Ultraviolet keratitis- Tx

A
  • Binocular patching
  • Cyclopentolate drops
  • Resoves in 24-48 hrs