OptoTech SD Freeform Progressive Lenses

The OptoTech SD progressive lens design spreads the unwanted astigmatism across larger areas of the lens surface, thereby reducing the overall magnitude of blur at the expense of narrowing the zones of perfectly clear vision. The astigmatic error may even affect the distance zone. Consequently, softer progressive lenses generally show the following characteristics: Narrower distance zones, wider near zones, and lower, more slowly increasing levels of astigmatism (widely spaced contours). The max. amount of unwanted astigmatism is reduced to an incredible level of approx. 75% of the addition power.This design variant is partly applicable for modern working places.

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Corridor Length (CL)	9 / 11 / 13 mm
Near Reference Point (NPy)	12 / 14 / 16 mm
Minimum Fitting Height	17 / 19 / 21 mm
Inset	2.5 mm
Decentration	up to 10 mm at max. dia. 80 mm
Default Wrap	5°
Default Tilt	7°
Back Vertex	13 mm
Customize	Yes
Wrap Support	Yes
Atorical Optimization	Yes
Frameselection	Yes
Max. Diameter	80 mm
Addition	0.50 - 5.00 dpt.
Application	Indoor

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