A Short Quiz On Ophthalmology!
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Take this short quiz on ophthalmology! The eyes are said to be the windows to the soul, and therefore, you should ensure that they are very clear indeed and free from any diseases. The work of ophthalmologist is trained to perform eye exams, diagnose and treat disease, prescribe medications, and perform eye surgery. Take this Ophthalmology test series and get to revise for your exams.
- 1.
Band shaped keratopathy is caused by:
- A.
Amyloid
- B.
Calcium
- C.
Monopolysaccharide
- D.
Lipid
Correct Answer
B. CalciumExplanation
Band shaped keratopathy occurs due to the accumulation of calcium salts in a band pattern in the anterior corneal layers.Rate this question:
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- 2.
Bitemporal hemianopia field defect is characteristic of?
- A.
Glaucoma
- B.
Optic neuritis
- C.
Pituitary tumour
- D.
Retinal detachment
Correct Answer
C. Pituitary tumourExplanation
Pituitary tumors compress the optic chiasma and cause bitemporal hemianopia.Rate this question:
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- 3.
Afferent pathway for pupillary light reflex is:
- A.
Trigeminal nerve
- B.
Optic nerve
- C.
Abducent nerve
- D.
Ciliary nerve
Correct Answer
B. Optic nerveExplanation
The afferent pathway for the pupillary light reflex refers to the pathway through which sensory information from the eye is transmitted to the brain. In the case of the pupillary light reflex, the optic nerve is responsible for carrying this information. The optic nerve is specifically designed to transmit visual information from the retina to the brain, making it the correct answer for this question. The other options listed, such as the trigeminal nerve, abducent nerve, and ciliary nerve, are not involved in the afferent pathway for the pupillary light reflex.Rate this question:
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- 4.
Which of the following is not of prognostic significance in choroidal melanoma?
- A.
Presence of retinal detachment
- B.
Size of the tumor
- C.
Cytology of the tumor cells
- D.
Presence of extraocular extension
Correct Answer
A. Presence of retinal detachmentExplanation
Prognoistic factors in choroidal melanoma:
Extent of metastatic disease
Age
Size of intraocular tumour
Extent of extrascleral tumour extension
Ciliary body involvement
Histopathological and cytogenetic featuresRate this question:
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- 5.
As regards to intraocular retinoblastoma, which one of the following statements is false:
- A.
94% of cases are sporadic
- B.
Patients with sporadic retinoblastoma do not pass their genes to their offspring
- C.
Calcification in the tumor can be detected on ultrasound scan
- D.
Reese Ellsworth classification is useful in predicting visual prognosis following radiotherapy
Correct Answer
B. Patients with sporadic retinoblastoma do not pass their genes to their offspringExplanation
1/3 of sporadic cases of retinoblastoma are heritable.Rate this question:
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- 6.
Afferent component of corneal reflex is mediated by:
- A.
Vagus nerve
- B.
Facial nerve
- C.
Trigeminal nerve
- D.
Glossopharyngeal nerve
Correct Answer
C. Trigeminal nerveExplanation
The afferent component of the corneal reflex is mediated by the trigeminal nerve. This nerve is responsible for transmitting sensory information from the cornea to the brain. When the cornea is stimulated, such as by a foreign object or a gust of air, sensory signals are sent through the trigeminal nerve to the brain, triggering a reflexive blinking response to protect the eye from potential harm. The other nerves listed, the vagus, facial, and glossopharyngeal nerves, are not involved in mediating the afferent component of the corneal reflex.Rate this question:
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- 7.
The average distance of the fovea from the temporal margin of the optic disc is:
- A.
1 disc diameter
- B.
2 disc diameter
- C.
3 disc diameter
- D.
4 disc diameter
Correct Answer
B. 2 disc diameterExplanation
The correct answer is 2 disc diameter. The fovea is a small depression in the retina that is responsible for central vision. The optic disc is the point where the optic nerve exits the eye, and it is located on the nasal side of the retina. The average distance between the fovea and the temporal margin of the optic disc is 2 disc diameters. This means that the fovea is typically located about twice the distance of the diameter of the optic disc away from the temporal margin.Rate this question:
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- 8.
The retina receives its blood supply from all, except:
- A.
Posterior ciliary artery
- B.
Central retinal artery
- C.
Retinal arteries
- D.
Plexus of Zinn and Haller arteries
Correct Answer
A. Posterior ciliary arteryExplanation
The retina receives its blood supply from the central retinal artery, retinal arteries, and the plexus of Zinn and Haller arteries. The posterior ciliary artery does not supply blood to the retina.Rate this question:
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- 9.
The magnification obtained with a direct ophthalmoscope is:
- A.
5 times
- B.
10 times
- C.
15 times
- D.
20 times
Correct Answer
C. 15 timesExplanation
The magnification obtained with a direct ophthalmoscope is 15 times. This means that when using a direct ophthalmoscope, the image seen through the instrument appears 15 times larger than it actually is. This level of magnification allows for a detailed examination of the retina and other structures within the eye.Rate this question:
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 22, 2023Quiz Edited by
ProProfs Editorial Team -
Aug 19, 2011Quiz Created by
Pgblazer
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