1.
Hand Held Magnifier
To be used in some
of the exercises in conjuction with the spectacles to highlight the positive
benefits of magnification
2.
Instruction Booklet
Giving details of the package and guidance on how it should be used.
Duration 7 minutes with subtitles and BSL.
4.
Simulation Spectacles
Ten pairs in all,
classed into three groups as follows;
|
Group 1 |
Loss in visual field (peripheral field) - it affects
mobility more than close detail work. This can be experienced due to
retinitus pigmentosa, glaucoma, diabetes and after stroke. |
|
1. |
Total loss of peripheral
vision (tunnel vision). |
|
2. |
Loss of half visual
field in each eye (right side hemianopia). |
|
3. |
Loss of half visual
field in each eye (left side hemianopia). |
|
Group 2 |
Loss in visual acuity (central vision) - it affects
close detail work. This can be experienced due to cataract, macular
degeneration, advanced glaucoma, diabetes. |
|
4. |
Reduced visual acuity
leaving approximately 6/18 (just below driving standard). |
|
5. |
Reduced visual acuity
leaving approximately 3/60 to 1/60. A person would normally be registered
as blind with this level of visual acuity. |
|
6. |
Hazy vision with light
and scatter glare. Variable visual acuity. |
|
7. |
Reduced visual acuity
leaving less that 1/60 (hand movements or less). |
|
Group 3 |
Loss in both visual field and visual acuity - with
diabetic retinopathy, retinitus pigmentosa and some of the previously
mentioned conditions, this can be the more advance stage. |
|
8. |
Retinal degeneration
giving patchy vision. |
|
9. |
Loss of binocular
vision - light projection right eye approximately 6/18 left eye. |
|
10. |
Severe loss of vision
giving light projection only. |
It must be emphasised that the spectacles can only give some idea of what a visually impaired person may see, they are not meant to represent the view seen by a particular individual. They can help to identify some of the problems visually impaired people experience.
It must be remembered that
an individual's sight may fluctuate during the course of the day due to;
a) their general state of health
b) lighting conditions
c) decor