CORNEA MCQ 1

1.      What is average corneal thickness in microns

a.      410

b.      620

c.      730

d.    540

e.      580

2.      Regarding thickness of cornea

a.    It is thinnest centrally

b.      Thinnest  in nasal periphery

c.       Equal in all directions

d.      Thinnest in temporal periphery

e.      Thinnest inferiorly

3.      What is method of measuring corneal thickness

a.      keratometry

b.      Pachymetery

c.       Sclerotic scatter

d.      A-scan

e.      B-scan

4.      What is average power of cornea in diopters

a.      35

b.  43

c.      50

d.      60

e.      20

5.      Which method is more useful in diagnosis of pre-clinical keratoconus

a.     Corneal Pachymetry

b.    Corneal topography

c.      Retinoscopy

d.      Ophthalmoscoy

e.      A-SCAN

6.      Which method is used to study cell layers of cornea

a.      Corneal Pachymetry

b.      Corneal topography

c.       Ophthalmoscoy

d.      A-SCAN

e.  Scanning confocal microscope

1.      What is important tool in studying corneal endothelial cell loss

a.  Corneal confocal microscopy

b.  Corneal pachymetry

c.   Specular microscopy

d.  Retroillumination

e.     Sclerotic scatter 

8.      Most common cause of neurotrophic keratopathy is

a.  Bacterial keratitis

b.  Fungal keratitis

c.   Acanthamoeba keratitis

d.  Herpetic keratitis

e.  Surgical damage to trigeminal ganglion

9.      30 year old female presented with redness photophobia and blurry vision. On examination there giant papillary conjunctivitis. What is most common risk factor in corneal infections in developed countries

a.  Trauma

b.  Steroid use

c.   Diabetes

d.  Contact lens use

e.  Anterior lid margin disease

10.      A 40 – year old female presented with redness photophobia and  blurry vision. On slit lamp examination there is peripheral corneal ulcer. Most common association of peripheral ulcerative keratitis is

a.      Wegener granulomatosis

b.    Rheumatoid arthritis

c.       Polyarteritis nodosa

d.      SLE

e.      Ulcerative colitis