Fortnightly Quiz 7

This quiz has been expired, Answer key is given below

Question 1 of 20

The power of contact lens is NOT determined by its:

A refractive index
B thickness
C posterior curvature
D diameter

Question 2 of 20

The following is FALSE about a contact lens with the following numbers 8.8/13.7/-5.25:

A the base curve of contact lens is 13.7
B the diameter of contact lens is 13.7
C the base curve of contact lens is 8.8
D the contact lens has a power of -5.25

Question 3 of 20

Compare with spectacles, the contact lenses are except

A increase the field of vision
B reduce optical aberration
C minify images in myopia
D reduce aneisokonia

Question 4 of 20

The ‘antigenic load’ of a contact lens depends on all of the following EXCEPT:

A the health of the conjunctiva
B the surface characteristics of the contact lens
C the surface area of the contact lens
D corneal sensitivity

Question 5 of 20

Long-term contact lens wear induces all of the following EXCEPT:

A changes in the bacterial flora of the conjunctiva
B increased corneal light scatter
C stromal thinning
D increased tear evaporation

Question 6 of 20

Which of the following statement is false in Low vision management?

A A 4 point optotype subtend 5 min of arc at 40 cm viewing distance.
B N notation can be converted to M notation
C Number is easier to guess than letter optotypes
D Vision number chart does not use proportional spacing.

Question 7 of 20

A patient complains of difficulty in finding the beginning of next line when reading. Which test can be performed to assess this difficulty?

A Contrast sensitivity test
B Amsler grid chart
C Potential acuity meter test.
D Arc perimetry

Question 8 of 20

In low vision evaluation contrast sensitivity test may be helpful in determining.

A Dominant eye
B Monocularity versus binocularity.
C Need for increased magnification.
D All of the above

Question 9 of 20

Which of the statement is correct while performing perimetry with scanning laser ophthalmoscope?

A the retina is stimulated with visible white light.
B the light stimulus is visible to the patient as well as the examiner
C the target can have varied illumination levels and is therefore capable of static testing alone.
D both A and B.

Question 10 of 20

Which ocular disorder would probably respond best to a multiple pinhole lens?

A Advanced glaucoma
B Advanced Retinitis pigmentosa.
C Corneal dystrophy
D Dry ARMD

Question 11 of 20

A patient was prescribed a telescope for distance vision, however he complained of complained of glare and reduced image quality with the current telescope. What should be the possible solution of this case?

A To prescribe a telescope with smaller objective lens
B To prescribe a telescope with larger objective lens
C Decreasing the vertex distance
D Increasing the vertex distance

Question 12 of 20

At 20 feet, the smallest letters that a child can read is the 20/60 line. You have the child walk toward the eye chart. How far does she walk before she can see the 20/20 line?

A 15 feet
B 7 feet
C 13 feet
D 5 feet

Question 13 of 20

An adult has diplopia and a left hypertropia of 6 ∆. Which combination of prisms in his glasses would help to align the two images for him?

A OD 3∆ base- up OS 3∆ base-up
B OD 6∆ base-down OS Nothing
C OD 4∆ base-down OS 2∆base-down
D OD 7∆ base- up OS 7∆base-down

Question 14 of 20

A patient wears +3.00 + 2.25 × 60°. If all of her astigmatism is corneal, what could her keratometry measure?

A 38.50 D at 120°, 43.75 D at 30°
B 40.00 D at 60°, 42.25 D at 150°
C 45.75 D at 30°, 48.00 D at 120°
D 41.25 D at 150°, 43.50 D at 60°

Question 15 of 20

An uncorrected, cyclopleged patient looks at an Amsler grid 40 cm away. The vertical lines are focused sharply when a +4.75 D sphere is held in front of this eye. The horizontal lines are sharpest with a +6.00 D sphere. What is her distance correction?

A +4.75 + 1.25 × 180°
B +2.25 + 3.75 × 90°
C +2.25 + 1.25 × 180°
D +1.25 + 2.50 × 90°

Question 16 of 20

A -4.00 D myopic patient has +2.00 D reading adds ground into his lenses. Which type of bifocal segment will minimize image displacement?

A Round-top
B Slab-off
C Flat-top
D Franklin

Question 17 of 20

A patient wears the following prescription: - 1.00 + 2.00 × 180° & - 2.50 + 1.00 × 90° Add + 3.00 OU. His bifocal segment is located 10 mm inferior to the optical center of the glasses. How much relative prism is induced when he looks through the top of his bifocal?

A 1.50∆ right base- up
B 2.00∆ left base-up
C 2.50∆ right base- up
D 3.50∆ right base- up

Question 18 of 20

What strength of lens is needed so that a patient with 20/160 visual acuity can read newsprint without accommodation?

A +5.00 D
B +8.00 D
C +10.00 D
D +12.50 D

Question 19 of 20

Which of the following statement regarding basic retinoscopy is correct

A The projection phase of retinoscopy describes the formation of an image at the far point of eye.
B The point of reversal occurs when the patient nodal point is coincident with the observer far point.
C The point of reversal is seen with a – 4D myope examining a + 5D hypermetrope using a +1D trial lens.
D A with movement is seen at a 50 cm working distance examining a + 1D patient.

Question 20 of 20

A 71 year old patient has VA of 6/18 R and L due to age related macular degeneration:

A For watching television, this patient would benefit from a pair of 2x telescopes mounted in a spectacle frame as this would give an equivalent 6/6 acuity.
B A pair of 4x telescopes would be useful for shopping.
C This patient should be advised that their vision will make night driving difficult, but that driving in bright sunlight will be relatively easy.
D A + 12D magnifying lens would give about 2x or 3x magnification for reading.