Fortnightly Quiz 10

This quiz has been expired, Answer key is given below

Question 1 of 20

When compared to the general population atopic patients tend to have:

A thicker corneas
B thinner corneas
C larger diameter corneas
D smaller diameter corneas

Question 2 of 20

An immediate hypersensitivity response related to CL develops:

A after a second exposure to an allergen
B after a single exposure to an allergen
C in response to the plastic of a lens
D typically several months after starting lens wear

Question 3 of 20

CLAPC develops in what percentage of soft contact lens wearers after one year?

A All cases eventually
B 20% to 25%
C 5% to 10%
D 1% to 5%

Question 4 of 20

Patients with CLAPC:

A are often allergic to cats
B can have no other features of atopy
C usually have severe asthma
D usually have severe eczema

Question 5 of 20

Itch is a symptom in Contact Lens wearers:

A pathognomonic of CLAPC
B of allergic eye disease but not of CLAPC
C of allergic eye disease including CLAPC
D suggestive of toxicity

Question 6 of 20

What is the equivalent power of 2x Galilean telescope consisting of +25.00D objective and - 50.00D ocular that is focal for 40 cm.

A Plus 2.500D
B Plus 5.00D
C Plus 7.50D
D Plus 10.00D

Question 7 of 20

What telescopic magnification would be required for a patient whose best corrected visual acuity is 10/120 for reading street signs where the estimated needed acuity is 20/40

A 4x
B 4.5x
C 6x
D 7.5x

Question 8 of 20

You are given a task to instruct the patient on using a telescope. Which of the following order of the steps are correct?

A Focussing localization spotting tracing tracking scanning
B Localization focusing spotting tracking tracing scanning
C Spotting tracing tracking localization focusing scanning
D Localization focusing spotting tracing tracking scanning

Question 9 of 20

According to kestenbaum’s rule how much magnification would be required for a patient whose best distance VA is 20/160 (if he has to read 20/50 reduced Snellen)

A 4x
B 2x
C 4D
D 6D

Question 10 of 20

What lens power would be required for a patient to read 1M when the patient best VA is 0.40/4M?

A Plus10.00D
B Plus 8.00D
C Plus 12.00D
D Plus 14.00D

Question 11 of 20

Which statement is correct when a low vision patient uses electronic display magnification?

A there is only a minimum amount of magnification that may be obtained
B font types cannot be modified
C with increased magnification there is a corresponding reduction in the amount of material displayed on the screen at any given time
D letter spacing cannot be modified

Question 12 of 20

If a low vision patient has VA of 20/100 through his spectacle lenses which system should be initially evaluated?

A electronic display system
B optical devices
C vocalization system
D Braille display system

Question 13 of 20

Four point print is equal to

A 1M
B 0.4M
C 0.8M
D 0.5M

Question 14 of 20

The largest category of nonoptical devices is probably which of the following

A relative distance devices
B relative size devices
C writing devices
D mobility devices

Question 15 of 20

Illumination controls used for distance vision include

A side shields
B multiple pinhole spectacles
C tints and coatings
D typoscopes

Question 16 of 20

The greatest advantage of large type materials is that they

A have better contrast and therefore greater visibility
B are available in relatively large amounts of magnification
C permit more habitual and therefore comfortable reading
D are less cumbersome than most means of magnification

Question 17 of 20

Of the following filters which one has the properties of being photochromic and having the ability to incorporate patient’s refractive correction?

A NoIR 107
B UV Shield
C Neutral density gray
D CPF 550

Question 18 of 20

The total magnification of a CCTV incorporates the following magnification

A relative size magnification
B projection magnification
C relative distance magnification
D b and c

Question 19 of 20

When glare affects the middle and low spatial frequency levels of a patient’s contrast sensitivity you would most likely expect this patient to experience problems with which of the following?

A Mobility
B Visual acuity
C Colour vision
D Light Adaptation

Question 20 of 20

How much minification is obtained when a patient views through a -12.00 D lens held 40 cm from the eye?

A 3.0x
B 3.3x
C 4.8x
D 4.2x