Toric lenses are used primarily in eyeglasses, contact lenses and intraocular lenses to correct astigmatism. A torus results when a circle with radius r rotates around an axis lying in the same …

Just as aspheric denotes a surface that departs from being completely spherical, ‘atoric’ denotes a surface that departs from being an exact circular toric.

Since any atoricity is most often applied to the toric surface of the lens, atoric can be thought of as a departure from a standard toric surface, just as aspheric refers to a departure from a spherical surface.

"Atoric" lens designs vary the amount of asphericity between the sphere and cylinder meridians to individually optimize both, providing a significantly wider field of clear vision.

Jul 1, 2006 · Atoric lenses have a spherical front surface and aspherized cylinder curves on the back surface. Lens designers can precisely optimize both the sphere meridian and the cylinder meridian to …

Toric intraocular lenses (T-IOLs) may lose their optical quality if they are not correctly positioned inside the capsular bag once implanted.

Aspheric lens designs correction for astigmatism. Further, 50% of these employ a non-spherical surface that changes in wearers have corrections with over 0.50 D of cylinder power. This article will show …

A design with highly effective aberration control compensates for aberration by ray tracing against full astigmatism (extending to periphery of the lens).The result is an optimal atoric surface and a …

Shamir Spectrum – Single Vision™ provides patients a technologically advanced single vision lens that delivers a precise Rx at a price that fits any budget. Shamir Spectrum – Single Vision™ provides …

Feb 25, 2016 · You also should be aware of the concept of aspheric or atoric lens designs, the advantages and disadvantages of them, as well as how to order and fit these lens designs.