Flat Top or 'D' Bi Focal Lens:These are the most popular bifocals. The shape of the segment is inverted 'D'.The size of the segment presently available is 28mm.
Features:- Shape of the segment is inverted "D".
- Large field of vision for reading.
- Easily adaptable.
- Available in Finish and Semi-Finish.
- Finish Range: Sph 0.00 to +3.00 with add power 1.00 to 3.00 & Sph 0.00 to +2.00 Cyl -0.25 to -1.00 with Add power 1.00 to 3.00 90 degree axis in 1.49 Index.
- Semi-Finished Range: Bases 4.00, 6.00 & 8.00 with Add power 1.00 to 3.00 in 1.49 Index.
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