Duopal/Trifocal
With a segment in the
lower area of the lens, a bifocal or trifocal displays
two different or three dioptric powers.
|
Duopal/Trifocal
With a segment in the
lower area of the lens, a bifocal or trifocal displays
two different or three dioptric powers.
|
Duopal-/
Trifocal lenses provide presbyopes with clear vision
for two or three different ranges, usually for distance,
intermediate and near vision.