Chapter 4- Dispensing part I (1)

Question 1

What is a dispensing optician?

Answer 1

Person who is qualified to fit and supply glasses and lenses with the prescription from the optometrist.

Question 2

What can dispensing opticians specialise in?

Answer 2

They can specialise in low vision and contact lenses.

Question 3

What qualification would a dispensing optician have?

Answer 3

They would have an ABDO qualification- Association of British association dispensing optician

Question 4

What types of lenses are there?

Answer 4

1- Single vision
2- Bifocal
3- Trifocal

Question 5

What are single vision lenses?

Answer 5

They are lenses for one distance only

Question 6

What can the Rx be for single vision glasses/lenses?

Answer 6

Spherical, cylindrical, or both.

Question 7

What does DV, IV, and NV stand for?

Answer 7

DV = Distance vision
IV = Intermediate vision
NV = Near vision

Question 8

What is an Rx?

Answer 8

Rx = prescription

Question 9

For the prescription, what does DV equal?

Answer 9

DV = DV Rx

Question 10

For the prescription, what does IV equal?

Answer 10

IV = DV Rx + IV add

Question 11

For the prescription, what does NV equal?

Answer 11

NV = DV Rx + NV add

Question 12

What are bifocals?

Answer 12

They are glasses/ lenses designed for two distances.

DV and NV, DV and IV, etc.

Question 13

Bifocals have a near portion. What does it do?

Answer 13

Assists with near vision

Question 14

What is the disadvantage of bifocals?

Answer 14

It is not cosmetically appealing.

Question 15

What are trifocals?

Answer 15

Glasses for all three distances.

Question 16

What are varifocals/ progressive power lenses?

Answer 16

A lens that allows a number of focusing distances for dv, iv, nv, etc.

Question 17

What do the majority of varifocal lenses have over most of the upper hemisphere?

Answer 17

They have a stabilised zone of distance vision

Question 18

What do varifocal lenses have at the lower edge of the lens?

Answer 18

A small stabilised zone for near vision.

Question 19

What connects the lower edge and the upper hemisphere?

Answer 19

A narrow channel with a gradually increasing plus power called the progression zone.

Question 20

What are the disadvantages of bifocals and varifocals when using computers?

Answer 20

1- Stiff neck when moving your head up and down to look through the right lens.

2- Visual discomfort (asthenopia)

Question 21

What are visual display terminals?

Answer 21

Computer, etc

Question 22

When seeing patients, you would ask them whether they use a computer (visual display terminal) and you ask:

Answer 22

1- How many hours a day they use it

2- How many days a week they use it

3- What is their viewing distance

Question 23

What can happen to your eyes when using a computer?

Answer 23

You can get sore and dry eyes

Question 24

Why do you get sore and dry eyes when using a computer?

Answer 24

Because when you concentrate on the computer, the blink rate is reduced.

Question 25

If a patient complains about having sore eyes, you would:

Answer 25

1- Tell them to take regular breaks when sat at the computer

2- If it is too bright, you would pull the blinds down or turn the brightness down on the computer to reduce it

3- To have screens below eye level

4- To have screen 90 degrees to the window to prevent any glare coming onto the screen