LOW VISION DEVICES Flashcards
These are devices that will maximize residual visual function by
increasing the visual information available to a person with low vision
Low vision devices
These are supplementary devices, used together with optical devices
that does not use lenses or prisms, it alters spatial relationships and modify the environment
Non-optical low vision devices
These are devices that will assists patients with low vision to carry on activities of daily living (ADL)
Low vision devices
This is consist of one or more lenses or prisms placed between the eye
and object to be viewed which increase the size of the object to the
retina
Optical Low vision devices
These are like miniature binoculars attached to the spectacle frame
Bioptic Telescopes
a combination of lenses fitted in a tubular form to get a magnify view of
distance objects
Telescopes
used to view objects at a close range
Extra Short- focus telescope
2 type of stand magnifier that is transparent:
- Dome magnifier
- Bar magnifier
magnifying aid held in the hand in front of the eye for viewing small
objects at close range
Hand magnifier
magnifying aid that is compact and foldable
Compact magnifier
magnifying aid fitted in a casing
Stand Magnifier
An electronic magnifier consisting of a camera with zoom lens and a monitor for reading
CCTV
Lenses that cut off glare and undesirable frequencies of the visible light
Absorptive
A patient with macular degeneration will work better under
______________ level of illumination
Direct Light
A patient with retinitis pigmentosa will work better under ______________ level of illumination
Incandescent light
A patient with glaucoma will work better under ______________ level of illumination
Natural light
This is the optical low vision device that is recommended when writing:
Spectacle magnifier
This is the optical low vision device that is recommended if the patient has dexterity problems
Spectacle magnifier
This is a non-optical low vision device that helps the patient when writing
- Letter—writer
- Writing guide
This is a non-optical low vision device that helps the patient when
reading
Typoscope
these low vision aids are recommended for book lovers
- Reading stand
- typoscope
this low vision aids are recommended for a low vision field worker
telescope
Typoscope serves the ff. purposes:
- Reading stand
- avoid glare
Writing guide serves the ff. purposes:
- avoid glare
- writing guide
For long reading, the recommended low vision aids are
Spectacle magnifier
For looking at a diagram, the recommended magnifier is
stand magnifier
This is being use so as not to lose place while reading
Typoscope
The ff. solutions are recommended if the patient encountered dimness of material while using the low vision aids:
- Change direction of illumination
- Increase illumination
- Increase contrast
The ff. solutions are recommended if the patient encountered material out of while using the low vision aids
Check working distance
The ff. solutions are recommended if the patient encountered eye
fatigue while using the low vision aids:
- Shorten reading time
- Eccentric Viewing
- Reading stand
are recommended if the patient encountered postural fatigue while using the low vision aids
Reading stand
are recommended if the patient encountered glare while
using the low vision aids
- Check direction of illumination
- Anti-glare devices
- Typoscope
are recommended if the patient encountered distortion
while using the low vision aids
- Check position of reading material
- Clean the lens
- Frame Adjustment
are recommended if the patient encountered losing
place when reading with the use of low vision aids
- Typoscope
- Systematic reading
- eccentric viewing
are recommended if the patient encountered inverted
image while using the low vision aids
Check working distance
are recommended if the patient encountered double
vision while using the low vision aids
Check PD
pertains to relative size magnification
- Physical enlarging the image of the object
- do not use telescopic systems
pertains to relative distance magnification:
- Brought by moving the object closer to the patient
- do not use telescopic system
pertains to relative angular magnification
Produced By telescopic system
pertains to relative electro-optical magnification
Computer Generated
It increases the size of the text and It showers the reading material with full spectrum light and is recommended for long reading
Magnifying lamp
It offers the ideal lighting atmosphere where the light gently flows over patient’s shoulder to splash across the page he is reading
Floor Lamp
It disperse more light and less heat, to provide an overall improved and more comfortable lighting source
Full-spectrum Light
It allow colors to be seen in their true color, in natural light:
Chromalux Light bulbs
This has a combination of high-intensity bulbs and powerful
magnification of up to 5X and is recommended for patients who are into craftmanship
big-eye lamp
The recommended absorptive lenses for low-light environments
Yellow
The recommended absorptive lenses for more intense lighting
Amber
benefits of absorptive lenses:
- Filters out UV rays
- Filters out IR rays
- reduces glare
examples of anti-glare devices:
Hat or Visors
Typoscope
Absorptive Lens
