Chapter 14- Introduction to low vision Part 2

Question 1

What is a non-optical low vision aid?

Answer 1

This is a device which doesn’t use any optical lenses, but that helps people with low vision to function more effectively and comfortably during visual tasks.

Question 2

What are some examples of non optical devices?

Answer 2

1- Electronic devices,

2- Large print books,

3- Speech synthesisers

Question 3

What is probably the most important optical aid?

Answer 3

Lighting

Question 4

Performance increases with improvements in what for older people and visually impaired subjects?

Answer 4

Task illuminance

Question 5

How much light does a 60 year old receive in relation to a 20 year old?

Answer 5

A 60 year old retina receives one third of the amount of light that reaches the 20 year old retina.

Question 6

In order to optimise the lighting for visually impaired patients, you would…

Answer 6

Increase the general ambient level of illuminance

Question 7

What are some examples of increasing the general ambient level of illuminance?

Answer 7

1- Paint house walls with light colours

2- Carry torch when ambient lighting is poor.

Question 8

Visually impaired people that suffer from a glare can cause a reduction in what?

Answer 8

Visual acuity

Question 9

How would you reduce the affects of a glare?

Answer 9

By wearing sunglasses or visors.

These are low vision non optical devices

Question 10

In order to make reading/writing easier for elderly patients, what would you recommend?

Answer 10

1- Reading stands
2- Writing guide
3- Signature guide

Question 11

Name some large print items

Answer 11

1- Large print books
2- Large print newspapers
3- Large print watches

Question 12

Name some talking devices

Answer 12

1- Talking watches

2- Talking newspapers

3- Talking blood glucose meter- people with diabetes can get diabetic retinopathy so this is important

Question 13

For people with low vision, what can they use to manage money?

Answer 13

1- Note detector

2- Coin holder

Question 14

What are the advantages of an electronic visual enhancement system (CCTV)?

Answer 14

1- Larger range of magnification

2- Variable magnification- can tailor it to your vision

3- Good field of view

4- Can use both eyes

Question 15

What are disadvantages of an electronic visual enhancement system (CCTV)?

Answer 15

1- Can be quite bulky- won’t be able to carry it easily

2- Expensive

Question 16

What are some examples of electronic visual enhancement systems?

Answer 16

1- Mouse style devices- need an ordinary TV or computer and is the cheapest option

2- Portable devices- also cheap

3- Desktop varieties- Expensive

Question 17

What are head mounted devices?

Answer 17

These are glasses that make use of cameras and project an image that you are looking at

Question 18

What are some examples of head mounted devices?

Answer 18

1- Give Vision glasses

2- Esight glasses

Question 19

What is the disadvantage of head mounted devices?

Answer 19

The disadvantage is that they are very expensive.

Question 20

What options on your phone and computer allow patients with visual impairment to use it with ease?

Answer 20

Accessibility options

Question 21

What is braille?

Answer 21

Braille is a tactile reading code that enables people to access information by touch.

Question 22

What are some braille gadgets?

Answer 22

1- Braille note

2- Braille displays

Question 23

What are some charities that help the visually impaired?

Answer 23

1- RNIB- Royal national institution for blind people

2- Guide dogs for the blind

3- Macular society

Question 24

Who are some of the personnel that are involved in low vision services?

Answer 24

1- Optometrists

2- Carers, family members, etc

3- General practitioners

4- Orthoptists