spherical lens


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spherical lens

A lens in which all surfaces are spherical.
See also: lens
References in periodicals archive ?
Corneal moulding, which in turns leads to spectacle blur, may also be apparent--this is induced when the differential bearing effect of a spherical lens on a large astigmatic cornea leads to an unwanted alteration in the refraction after removal of the lens
Table 53: Leading Players in the US Spherical Lens Market
If the sag of a spherical lens is read using a lens measure, the measurement obtained will be the same, no matter where the lens measure is placed on the surface.
Today's variation, the availability of RGP (2) as a spherical lens, is a healthier option because of better oxygen transmission to the cornea.
4A spherical lens for portraits plus 500mm and 800mm f/8.
Spherical Aberrations result from the fact that focal points of light rays far from the optic axis of a spherical lens are different from the focal points of rays of the same wavelength passing near the center.
3) Unlike spherical lens wearers, this inconsistent vision means astigmats find their lenses do not always perform well enough to use during all daily activities.
Biomedics XC is the latest addition to the PC Hydrogel family of products and is the first PC Hydrogel lens to be offered in a two-week modality, the most popular spherical lens modality in the United States (source: HPR).
CVI's disposable spherical lens business grew 30%, driven by Frequency Aspheric and Proclear sphere.
The products acquired consist of an extended wear conventional spherical lens (Softcon EW) and a daily wear conventional lens (Aquaflex) that will be marketed and distributed by the Lombart lens division of Unilens Corp.

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