Bifocal /

Kryptok

Kryptok

Round seg bifocal lens.

Another popular fused bifocal is the round seg bifocal. An advantage of round seg bifocals is that the line separating the distance and near zones of the lens tends to be less noticeable than the upper line of a D-seg bifocal.

Also referred to as a round lens, the magnifying area in the lower part of the lens is a complete circle. The lens can restrict viewing up top, due to the round shape. There is less significant transition between reading and distance vision.


Availibility for organic

Index Segment Size (mm) Ø (mm) Finish Semi-Finish
Organic 1.50 28 70 SPH +2.00 up to -2.00
ADD +1.00 up to +3.00
Base 2, 4, 6, 8 
ADD +0.75 up to +3.50
Organic 1.56 Clear &
SunSible Photochromic Grey
28 70 SPH +2.00 up to -1.00
ADD +1.00 up to +3.00
Base 1.5, 3, 5, 7 
ADD +1.00 up to +3.00

Availibility for mineral

Index Segment Size (mm) Ø (mm) Finish Semi-Finish
Organic 1.523 28 65 - Base 4.25, 6.25 
ADD +1.00 up to +3.00

  Bifocal Lens