CORNEA QUIZ

What is the most likely diagnosis in the above patient with complaints of pain, redness, lacrimation and photophobia since the past 2 days?

• Fungal corneal ulcer

• Bacterial corneal ulcer

• Trachoma

• Granular corneal dystrophy

All of the following can be seen in the image except

• Hypopyon

• Wessely immune ring

• Feathery ulcer edges

• Hyperemia

The cornea in the above image has been stained with

• Alcian blue

• Fluorescein

• Rose Bengal

• Lissamine green

Transparency of cornea is mainly due to which layer?

• Endothelium

• Descemet's membrane

• Bowman's membrane

• None of these

Normal corneal endothelial count in a young adult is

• 500/mm²

• 2500/mm²

• 4500/mm²

• 6500/mm²

All are true regarding cornea except:

• Endothelium help in maintaining dehydrated state

• Oxygen is mostly derived by epithelium directly from the air through tear film

• Glucose supply for corneal metabolism is mainly derived from the aqueous

• Richly vascular

Fluorescein dye is used to stain

• Areas of denuded epithelium

• Diseased and devitalized cells

• Mucus

• All of the above

A 60-year-old man complains of left eye pain and photophobia. On examination there is an erythematous rash of the periorbital skin and forehead on the left side. You also note erythema and a small vesicle on the tip of the patient's nose. His ipsilateral conjunctiva is injected and after staining the affected eye with fluorescein, Wood's lamp examination reveals corneal uptake in a fine branching pattern. What is the most appropriate therapy for this patient?

• Oral famciclovir 800 mg three times a day for 7-10 days

• Oral valacyclovir 500 mg three times a day for 7 days

• Oral acyclovir 800 mg three times a day for 7 days-10 days

• Topical acyclovir, 5 times a day until resolution of ocular symptoms

Which of the following is the drug of choice for treatment of corneal ulcers caused by filamentous fungi?

• Itraconazole

• Natamycin

• Nystatin

• Fluconazole

Which organism does not invade intact cornea?

• C.diphtheria

• N. meningitidis

• N. gonorrhoea

• Pseudomonas