- A
cylindrical lens is a
lens which focuses light into a line
instead of a
point as a
spherical lens would. The
curved face or
faces of a
cylindrical lens...
- Such a
lens behaves like a
combination of a
spherical lens and a
cylindrical lens.
Toric lenses are used
primarily in eyegl****es,
contact lenses and intraocular...
-
drilled perpendicular to the lamina. The hole is then ****ed with a
cylindrical lens. The
lamina is
grown in the patients' ch**** for a
period of months...
- microscopic, at the
wavelength scale.
Cylindrical A
cylindrical Fresnel lens is
equivalent to a
simple cylindrical lens,
using straight segments with circular...
-
corrective lens power in
patients with astigmatism. It is also used for
testing near
point of the eye.
Jackson cross cylinder is a
single low
power lens, which...
- axis may then not p****
through the
physical centre of the
lens.
Toric or sphero-
cylindrical lenses have
surfaces with two
different radii of
curvature in...
- how a
particular lens is
different from a
lens composed of
purely spherical surfaces.
Patients with
astigmatism need a
cylindrical lens, or more generally...
- a
laser beam
which is
focused only in one
direction (e.g.
using a
cylindrical lens). A
second method uses a
circular beam
scanned in one
direction to...
-
lens. An
einzel lens is an
electrostatic lens that
focuses without changing the
energy of the beam. It
consists of
three or more sets of
cylindrical or...
- Technirama), and
cylindrical lenses (
lenses curved,
hence squeezing the
image being photographed, in only one direction, as with a
cylinder, e.g. the original...
