Optometry mcq and ophthalmology mcq part: 05

01. The total refractive power of the aphakic eye is

1. 38D
2. 43D✓
3. 60D
4. 20D

In an aphakic eye the only refractive surface is cornea.

02. Retinal image size in uncorrected hypermeropic eye is

1. Big
2. Small✓
3. Normal
4. None

Since hyperopic eye is small, retina is close to nodal point. So image size will be small.

03. Power of lens with 10cm focal length

1. 1/10D
2. 1D
3. 10D✓
4. 100D

D=1/f, but remember f should be in meter.

04. Water silk appearance in retina is seen in

1. Pathological myopia
2. Simple myopia
3. Hypermetropia✓
4. High astigmatism

05. Lens with a long focal length is

1. Thick
2. Thin
3. Not strongly curved
4. Both B and C✓

06. Test not used in astigmatism

1. Stenopaeic slit
2. Maddox V
3. Jackson’s cross cylinder
4. Bagolini striated glasses✓

07. Total internal reflection occur when a ray of light passes from

1. Denser medium to rarer medium✓
2. Rarer medium to denser medium
3. One medium to another of same refractive index
4. None

08. Stiles-Crawford effect is more sensitivity of the retina to

1. Perpendicular rays than the oblique rays✓
2. Bright ight than dim light
3. Bright colours than dull colours
4. Quick movement than slow movement

Stiles-Crawford effect is a natural mechanism to reduce optical abberations in human eye.

Other mechanisms include

Cutting off of the peripheral rays by iris,

High refractive index of the nucleus of the lens than that of the cortex,

Low sensitivity of the peripheral retina,

Oval shape of the eye ball 

09. Anisometropia up to how much Diopters is well tolerated

1. 0.5 D
2. 1.0 D
3. 2.5 D✓
4. 5.0 D

0.5 D difference between the power causes 1% difference in retinal image size. Upto 5% difference is easily tolerated by brain. More than that may cause diplopia.

10. is best defined as:

1. One complete oscillation
2. The maximum displacement of an imaginary particle on the wave from the baseline
3. The distance between two symmetrical parts of the wave motion✓
4. Any portion of a cycle

> One complete oscillation refers to a cycle .

> maximum displacement of an imaginary particle on the wave from the baseline is amplitude.

>Any portion of a cycle is called a phase

12.Destructive interference is seen in:

1. Corneal epithelium
2. Refraction
3. Antireflective lens coatings✓
4. Photochromic lenses

 

13. power of a lens with focal length 10cm?

1. 10D✓
2. 1/10D
3. 1D
4. 100D

Use formula D=1/f

14. The unit of illuminance is:

1. Lumen
2. Lux (lumen per square metre)✓
3. Candelas (lumen per steradian)
4. Watts per steradian

Lumen is the unit for luminous flux,

candelas (lumen per steradian) for

luminous intensity and

Watts per steradian for radiant intensity.

15. The spherical equivalent of a lens with power +3.00 DS/-2.00 DC is:

1. +1.00 DS
2. +2.00 DS✓
3. -5.00 DS
4. -1.00 DS

 

16. Transpose the power -4.0DS/-3.00 DC x 45

1. -4.00 DS/+3.00 DC x 135
2. +4.00 DS/-3.00 DC x 135
3. -7.00 DS/+3.00 DC x 135✓
4. -7.00 DS/-3.00 DC x 135

17. Transpose +1.00 DS/+1.00 DC x 90 to toric formula with base curve -2 D:

a. +3.00 DS

———————

-2.00 DC x 180/-3.00 DC x 90

b. + 4.00 DS

——————

-2.00 DC x 90/-3.00 DC x 180 ✓

c. +3.00 DS

—————

-2.00 DC x 90/-1.00 DC x 180

d. +1.00 DS

—————

-2.00 DC x 90/-3.00 DC x 180

18. The power -2.00DS/+1.5DC x 75 is

1. Simple myopic astigmatism
2. Compound myopic astigmatism✓
3. Compound hypermetropic astigmatism
4. Mixed astigmatism

If sph and cyl with different sign and cyl less than sph, it should be transposed first. The

above power becomes -0.5DS/-1.50DC 165

Mixed astigmatism occurs only if sph and cyl with different sign and cyl more than sph

(eg -1.5DS/+2.0DC 90)

19. Which of the following is not a problem with spectacle correction of
aphakia?

1. Image magnification
2. Ring scotoma
3. Pin-cushion distortion
4. Barrel distortion✓

Barrel distortion occurs with high minus lenses

20. infants are born with

1. Myopia
2. Hypermetropia✓
3. Astigmatism
4. Emmetropia

21. Simple myopia usually does not exceed

1. 9D
2. 3D
3. 6D✓
4. 12D

22. Which of the following is degenerative myopia

1. Congenital
2. Simple
3. Pathological✓
4. All

24. refractive esotropia is seen commonly in

1. Myopia
2. Hypermetropia✓
3. Astigmatism
4. Presbyopia

25. Radial keratotomy is used to correct

1. Myopia✓
2. Hypermetropia
3. Astigmatism
4. Presbyopia

26. In compound hypermetropic astigmatism

1. both the foci are in front of retina
2. both the foci are behind the retina✓
3. one focus is in front and one focus is behind the retina
4. none of the above

27.The complications of myopia include all EXCEPT

1. vitreous degeneration
2. retinal detachment
3. cataract
4. closed angle glaucoma✓

28.the far point of a myopic eye is

1. Infront of the Corneal plane✓
2. On the corneal plane
3. Behind the retina
4. At infinity

29. Tranta’s spots are noticed in cases of:

1. a. Active trachoma
2. b. Vernal kerato conjunctivitis✓
3. c. Corneal phlycten
4. d. Vitamin A deficiency

Bulbar form of VKC is characterised by dusky red triangular congestion of bulbar

conjunctiva in palpebral area, gelatinous thickened accumulation of tissue around limbus and presence of discrete whitish raised dots along the limbus known as Tranta’s spots.

30. Organism causing ophthalmia neonatorum is

1. a. Neisseria gonorrhoeae✓
2. b. staphylococci
3. c. streptococci
4. d. Neisseria meningitidis

31. Bitot’s spots are associated with

1. a. vitamin A deficiency✓
2. b. vitamin D deficiency
3. c. vitamin E dificiency
4. d. all of the above

Signs of vitamin A deficiency, as graded by the WHO, are:

• Night blindness (XN)
• Conjunctival xerosis (X1A)
• Bitot’s spots (X1B)
• Corneal xerosis (X2)
• Corneal ulcer covering less than 1/3 of the cornea (X3A)
• Corneal ulcer covering at least 1/3 of the cornea, defined as keratomalacia (X3B)
• Corneal scarring (XS)

31. Phlyctenular conjunctivitis is due to

1. a. pneumococcus
2. b. Pseudomonas pyocyanea
3. c. allergy to endogenous protein✓
4. d. allergy to exogenous protein

32. Blood vessels in a trachomatous pannus lie

1. a. beneath the Descemet’s membrane
2. b. in the stroma
3. c. between Bowman’s membrane and stroma
4. d. between Bowman’s membrane & epithelium✓

33. Cobblestone appearance of the conjunctiva is seen in

1. a. spring catarrh✓
2. b. angular conjunctivitis
3. c. eczematous conjunctivitis
4. d. trachoma

34. As a complication of acute mucopurulent conjunctivitis, the corneal ulcers that develop are

1. a. marginal✓
2. b. central
3. c. anywhere on cornea
4. d. no where

35. Pupil is pinpoint in

1. a. optic atrophy
2. b. absolute glaucoma
3. c. atropine
4. d. iritis✓

36. Cogan’s syndrome is associated with?

1. A. Keratitis✓
2. B. Conjunctivitis
3. C. Iritis
4. D. Myopia

Cogan’s syndrome is seen in middle aged adults.

The features include interstitial keratitis, acute tinnitus, vertigo and deafness.

Treatment is by usage of topical and systemic corticosteroids.

Early treatment is necessary to prevent permanent deafness and blindness.

37. Which of the following is seen in Lowe’s syndrome?

1. A. Glaucoma✓
2. B. Choroiditis
3. C. Secondary cataract
4. D. Myopia

Lowe’s syndrome is oculo-cerebro-renal syndrome. It is an inborn error of amino acid

metabolism. Congenital cataract and glaucoma are the ocular features. Mental

retardation, dwarfism, osteomalacia and muscular hypotonia are the other features seen

in this syndrome.

38. Paralysis of which cranial nerve cause neuroparalytic keratitis

1. A. 3rd
2. B. 4th
3. C. 5th✓
4. D. 6th

39. Weiss operation is done for?

1. A. Cicatricial entropion
2. B. Senile entropion✓
3. C. Senile ectropion
4. D. Cicatricial ectropion.

40. Hypopyon is seen in

1. A. Bacterial Corneal ulcer
2. B. Fungal Corneal ulcer
3. C. Viral Corneal ulcer
4. D. A&B✓