LOW MAGNIFICATION CATARACT Flashcards
1
Q
What is low vision?
A
A person who has an impairment of visual function even after treatment or standard refractive correction
2
Q
What are symptoms associated with cataract?
A
Opacification of the lens
Scattering of light - decreased vision
Glare sensitivity
3
Q
What is low vision management of cataract focused on?
A
Task lighting
Low amounts of magnification or image enlargement
Increased size = increased ability to resolve details
4
Q
What are the advantages of prescribing higher additions?
A
- Cosmetically and psychologically acceptable
- Hands free to perform tasks
- Large field of view
- May incorporate correction for ametropia
5
Q
What are the disadvantages of prescribing higher additions?
A
Shorter working distance than other low vision aids of same equivalent power
6
Q
What are the advantages of simple hand-held magnifiers?
A
- Convenient and discrete
- Socially acceptable
- Generally inexpensive
- Lightweight
- Internal illumination possible
- Can be used further from the eye
7
Q
What are the disadvantages of simple handheld magnifiers?
A
- Too easily purchased and used inappropriately
- Requires a steady hand and ability to maintain fixed working distance
