low vision aids 

http://www.freedom-eye.com/view_blog.asp?ID=220

· All low vision aids work by presenting the patient with

· A magnified view of object.

· Most are optical systems

• Which act by increasing the angle subtended by the  Object at the eye, thus producing an enlarged retinal  Image.

GOALS OF LOW VISION

Increase functionality

· Make the most of the remaining vision

· Provide link to community resources and support

· services  Education

FUNCTIONAL EFFECTS OF LOW VISION

Loss of central vision (visual acuity)

Loss of peripheral vision (visual field)

Glare and contrast Issues Related to Decreased Acuity

· Difficulty reading

· Problems writing/ completing paperwork

· Inability to recognize distance objects and faces

· Issues Related to Visual Field Loss

· Location of scotoma important!

· Generalized loss of visual field

· Mobility and independent travel

· Reading may require adaptations

Issues Related to Contrast

· Need for additional lighting

· Problems with glare

· Increased adjustment to changes in illumination

· Visual discomfort and fatigue