Winter 2012
Because of the slow processing of visual
information in the diseased or injured eye, many persons with limited vision are able to perceive the flicker in fluorescent lights, which is imperceptible to persons with healthy eyes. While this does not present a health problem to most people (except those with epilepsy) it does become a source of annoyance for some.
If there is a choice to light a school, workplace or
home with cool white or warm white tubes, then warm whites are the obvious choice. While warm white fluorescent tubes are a much better environmental choice than cool white; incandescent bulbs offer an even better environment. Incandescent bulbs are being phased out of production, however, starting in 2012.
If overhead warm white tubes are selected, they = 56 CONTENTS
can perform even better for the low vision user by the addition of a 1" peracube lens. This lens looks like a silver grid with cross pieces being 1" apart. Acrylic or Lucite lenses, which look more like sheets of semi- translucent material over the tubes, tend to scatter the light throughout the room and thus, rebound it within the eye several times. Use of these lenses should be discouraged.
