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Multifocal contact lenses (e.g. bifocals or progressives) are comparable to spectacles with bifocals or progressive lenses because they have multiple focal points. Multifocal contact lenses are typically designed for constant viewing through the center of the lens, but some designs do incorporate a shift in lens position to view through the ...
The effects of extended contact lens wear on the cornea have been studied extensively and are well-documented. When determining the effects of long-term contact lens use on the cornea, many studies do not differentiate between users of hard and soft contact lenses, while studies that have made this differentiation have found similar results.
A torus results when a circle with radius r rotates around an axis lying in the same plane as the circle (here the z axis) at a distance R from the centre of the circle.. A torus is the surface of revolution resulting when a circle with radius r rotates around an axis lying within the same plane as the circle, at a distance R from the circle's centre (see figure at right).
Chinon Industries Inc. (チノン株式会社, Chinon Kabushiki-gaisha) was a Japanese camera manufacturer. Kodak took a majority stake in the company in 1997, and made it a fully owned subsidiary of Kodak Japan, Kodak Digital Product Center, Japan Ltd. (株式会社コダック デジタル プロダクト センター, Kabushiki-gaisha Kodakku Dejitaru Purodakuto Sentā), in 2004. [1]
While the "(D)" designation is used on the box and in the documentation, the lenses just feature a "D" instead. Requires 8 lens contacts; lenses with only 5 contacts cannot support this feature. DT "Digital Technology", lenses for cameras with APS-C (or Super-35mm) size sensors, only. DT lenses will not fully illuminate the sensor/film area of ...
Consumers can purchase frames, prescription eyeglasses, prescription or plain sunglasses, and contact lens refills. [9] After choosing the desired frames, the consumer goes through a three-step process to order lenses including choosing the lens type, lens thickness, and optional enhancement features. [11]
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