Catalog: Maxi-Aids Products for Blind, Low Vision, Disabled 2006 1st Edition Catalog
Company/Brand: Maxi-Aids, Inc.
focal in Maxi-Aids Products for Blind, Low Vision, Disabled 2006 1st Edition Catalog by Maxi-Aids, Inc.
b with higher power lenses the focal distance also referred to as the ...
have the following strengths a 6 focal length with 2.6 magnification an 8 ... focal length with 2.2 magnification and a 12 ... focal length with 1.8 magnification plastic ... are easily changed to a variety of focal lengths acrylic lenses optic aid spring ...
