Presbyopia

Question 1

What is the estimated Add for a working distance of 40cm from the spectacle plane if the proximal point is located at 1m (all distances refer to the spectacle plane)?

a. 0.8D
b. 1.2D
c. 1.6D
d. 2.0D
e. 2.4D

Answer 1

d. 2.0D

Question 2

An Add was estimated to be 2D for a working distance of 35cm, how far from the spectacle plane is the patient’s proximal point?

a. 48cm
b. 52cm
c. 58cm
d. 69cm
e. 78cm

Answer 2

c. 58cm

Question 3

Presbyopia is considered present when the spectacle amplitude of accommodation has___________

a. increased to 3D
b. increased to 4D
c. decreased to 3D
d. decreased to 4D
e. reached an acceptable level

Answer 3

c. decreased to 3D

Question 4

All of the following increase in an ageing lens except which one?

a. amplitude of accommodation
b. optical density
c. opacity value
d. thickness
e. absorption

Answer 4

a. amplitude of accommodation

Question 5

What is the estimated Add for a working distance of 40cm from the spectacle plane if the proximal point is located at 50cm (all distances refer to the spectacle plane using spectacle accommodation)?

a. 0.80D
b. 1.25D
c. 1.50D
d. 2.00D
e. 2.40D

Answer 5

c. 1.50D

Question 6

A patient’s proximal point is at a distance of 80cm, and his Add was estimated to be 2.00 D. What working distance was considered? Distances refer to the spectacle plane.

a. 38cm
b. 52cm
c. 58cm
d. 69cm
e. 78cm

Answer 6

a. 38cm

Question 7

An uncorrected myope’s far point is at a distance of 33cm and he has 1.50D of accommodation. He reads well at his 33cm working distance without glasses. He finds it inconvenient to remove his glasses while he is at work during meetings. What bifocal Rx will suit him?

a. –3.00 // +0.80Dadd
b. –3.00 // +1.25Dadd
c. –3.00 // +1.50Dadd
d. –3.00 // + 2.00Dadd
e. –3.00 // +2.25D add

Answer 7

e. –3.00 // +2.25D add

Question 8

A Patient reads at 40cm and has accommodative amplitude of +3.00 what add power is indicated?

a. 0.80D
b. 1.00D
c. 1.25D
d. 1.75D
e. 2.00D

Answer 8

b. 1.00D

Question 9

A Patient reads at 40cm and has accommodative amplitude of +3.00 what is their total range of vision in their ideal bifocal add?

a. 100cm to 25cm
b. 50cm –33cm
c. 60cm –25cm
d. 75cm – 40cm
e. 80cm – 37cm

Answer 9

a. 100cm to 25cm

Question 10

An uncorrected 2.00D hyperope has 3.00D of accommodation. Her working distance is 33cm. What Rx will suit her best?

a. +2.00 // +1.00Dadd
b. +2.00 // +1.25Dadd
c. +2.00 // +1.50Dadd
d. +2.00 // + 2.00Dadd
e. +2.00 // +3.00D add

Answer 10

c. +2.00 // +1.50Dadd

Question 11

A patient needs +.50 over their current distance Rx for clarity. Then they need +1.00 over their new distance Rx to see at near. What is the total lens power needed to show them their new near add over the current Rx?

a. 0.50D
b. 1.00D
c. 1.25D
d. 1.50D
e. 1.75D

Answer 11

d. 1.50D

Question 12

A patient is wearing a +2.00 add. They have clear vision (range of clarity) as near as 33cm. What is the approximate amplitude of accommodation? (Rule of Thumb)

a. 1.00D 
b. 1.50D
c. 2.00D
d. 2.50D
e. 1.75D

Answer 12

a. 1.00D

Question 13

NRA is +2.00 and PRA is -0.50 what is the ideal near Rx for this emetropic early presbyope?
	a.  2.50D
	b.  2.00D 
	c.  1.75D
	d  1.50D
	e.  0.75D

Answer 13

e. 0.75D

Question 14

Rx +0.50D with + 2.00 Add is clear for near but blurry for distance. New refraction for better distance acuity is -0.50D. What should the new add be?

a. 1.00D 
b. 1.50D
c. 2.00D
d. 2.50D
e. 3.00D

Answer 14

e. 3.00D