Pg Blazer - Online Test Series 7 – Ophthalmology

  • USMLE
  • NBME
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Quizzes Created: 37 | Total Attempts: 137,734
| Attempts: 2,994 | Questions: 10
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1. Hyaluronic acid is present in?

Explanation

Correct answer : Vitreous humor, Hyaluronic acid is also present in cartilage, synovial fluid and loose connective tissue.

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Pg Blazer - Online Test Series 7 Ophthalmology - Quiz

MCQ's in Ophthalmology.  For more practice tests, go to PG Blazer Online Test Series

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2. All are common causes of childhood blindness except

Explanation

Congenital dacryocystitis usually does not cause blindness.

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3. The laser procedure, most often used for treating iris neovascularization, is:

Explanation

Panretinal photocoagulation is the treatment of choice for neovascularization of iris. It stops the angiogenic stimulus from the retina which is responsible for neovascularization.

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4. Disease with autosomal dominant inheritance is

Explanation

Bassen Kornzweig disease, Gyrate atrophy and Laurence Moon Biedl syndrome - Autosomal recessive inheritance
Best's disease - Autosomal dominant inheritance

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5. Occulomotor nerve palsy causes all except :

Explanation

Occulomotor nerve supplies:
Superior rectus
Inferior rectus
Medial rectus
Inferior oblique
Levator palpebrae superioris
Parasympathetic supply from ciliary ganglion to sphincter pupillae and ciliary body

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6. True stereopsis is perceived due to the following:

Explanation

The 2 eyes see the eyes from a slightly different angle. Hence the image formed is different. (Binasal retinal image disparity). When these images are fused, we get the impression of binocular vision.

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7. A patient presented with unilateral proptosis which was compressible and increases on bending forward. No thrill or bruit was present. MRI shows a retroorbital mass with enhancement. The likely diagnosis is -

Explanation

Proptosis that increases with Valsalva manouvre or bending forwards is probably due to vascular lesions such as orbital varix.

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8. Which of the following does not handle the oxidative damage in the lens?

Explanation

Antioxidants that function to prevent oxidative damage in the lens:
-Superoxide dismutase
-Catalase
-Glutathione peroxidase
-Vitamin C
-Vitamin E

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9. The following ocular structure is not derived from surface ectoderm:

Explanation

Sclera is derived from paraxial mesoderm

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10. Which one ofthe following statements, concerning persistent hyperplastic primary vitreous (PHPV) is true?

Explanation

PHPV does not undergo calcification. The visual prognosis is poor.
Differentiating features compared to retinoblastoma : Microphthalmos, presence of cataract, unilateral nature, no calcification in CT scan, no family history

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Hyaluronic acid is present in?
All are common causes of childhood blindness except
The laser procedure, most often used for treating iris...
Disease with autosomal dominant inheritance is
Occulomotor nerve palsy causes all except :
True stereopsis is perceived due to the following:
A patient presented with unilateral proptosis which was compressible...
Which of the following does not handle the oxidative damage in the...
The following ocular structure is not derived from surface ectoderm:
Which one ofthe following statements, concerning persistent...
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