The timelike ruled surface with a spacelike base curve
is denoted by M.
Thereafter, we determined relations between Frenet-Serret invariants of spherical images and the base curve
Aspheric lenses do not necessarily provide better optical performance than best form lenses, but simply provide comparable performance without the restrictions imposed by best form base curve
38% of the nominal, but its spread versus the base curve
remained at the level of 233 b.
A 3D online calculation module can be used as an interactive demonstration tool which shows exact base curve
, shape and substance at any point on the finished lens.
Because many of the corneas being fitted have a very steep central curvature, SiHy lenses with shorter base curves
are preferred eg, Acuvue Advance (Johnson & Johnson) (base curve
Its spread versus the base curve
totally remained at last year's level and formed 249 b.
75DS, which has a front surface nearly parallel to the back surface, won't dramatically alter the shape to which the base curve
of the RGP lens is being fitted.
The diameter and the base curve
of the trimmed button as per measurements were made by using City Crown Semiautomatic Lathe-Cutting Machine, Japan.
However, a contact-lens prescription also includes the manufacturer, type of lens, base curve
, and diameter.
Also, lens measurements such as power, diameter and base curve
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