Normal lenses often create glare, reflections, and "ghost
images." Now that can be eliminated with an anti-reflective
coating. What we see is a result of light being sensed by our
eyes. With normal glasses, much of the light reflects off the
lenses. This produces glare. It also reduces the wearer's visual
acuity. In other words, the light reflections are a visual and
cosmetic problem. Anti-reflective coatings increase light
transmission through the lenses to 99.5 percent. They make it
easier to see and easier for others to see you. These coatings
are especially useful for those viewing computer screens and
driving at night. For many people, different lenses are needed
for seeing at different distances. Bifocal lenses allow the
wearer to look through two areas of the lens. One area focuses
on distant objects, the other is used for reading. A little-
known fact is that bifocals were invented by Benjamin Franklin,
and his style of bifocals are still available today. Most of the
time the "reading" area is smaller,