TOPIC 14: EVES Flashcards
What are non-optical aids?
Non-optical LVAs can
- ease the use of magnifiers (stands and clamps)
-increase the visibility of task
What are the advantages and disadvantages of EVEs
advantages:
-Higher magnification than optical LVA
up to 30x magnification!
-Minimal peripheral aberrations, less amount of light loss than LVA
-Can be used binocularly
-Natural working distance, good posture
-variable magnification (Can still be used even if the patient’s eye condition worsens)
-Simple image manipulation eg contrast reversal, Black and white. yellow on blue etc.
disadvantages:
-Expensive
-Need batteries / power supply
-Equipment may break down
-May be difficult to manipulate object eg sewing, due to depth of focus (short range of distances where object is sharply focused)
What are some examples of sensory substitution?
Communication (tactile) -Braille
Communication (Auditory) -audiobooks, podcasts
Orientation and mobility -Symbol Canes To indicate visual impairment (white stripe for visual impairment, red for hearing impairment)
Orientation and mobility -Ultra-Cane Gives tactile feedback
(vibration) through the handgrip by using sonar to detect obstacles
Orientation and mobility - guide dogs
ORCAM– device able out loud to read test and recognise faces, products, object
