-
Tilted Bifocal Lens, in 1936, a
method of
grinding two
prescriptions simultaneously on that
Tilted Bifocal Lens, and in 1951, the
Cataract Bifocal Lens...
- in his
influential PhD thesis. It is
sometimes also
referred to as the "
bifocal tensor". As a
tensor it is a two-point
tensor in that it is a bilinear...
- inventor.
Among his many
creations were the
lightning rod,
Franklin stove,
bifocal gl****es and the
flexible urinary catheter. He
never patented his inventions;...
- The
first Varilux lenses'
surface structure was
however still close to a
bifocal lens, with an upper, aberration-free half of the
surface for far vision...
-
Progressive bifocal chorioretinal atrophy, also
known for its
abbreviations PBCRA or ****B, is a rare,
slowly progressive,
autosomal dominant syndrome...
-
Observatory Data Repository. 2002. Whitney,
Scott (1 July 2002). "The
Bifocal World of John ****: This
Niuean Writer and
Painter Is
Still Searching for...
- the
distance can be
clearly viewed over the top of half-eye readers. A
bifocal is a lens with two sections,
separated by a line (see
image to the right)...
-
evidence of
effectiveness of
bifocal lenses and
recommends it as the
method for "myopia control". In some studies,
bifocal and
progressive lenses have...
-
apart a
section of
about 15
pages to
discuss what he had
called bifocal ellipses. A
bifocal oval was
defined there as the
locus of a
point P
which moves...
- a
uniform refractive index. For
people with
presbyopia and hyperopia,
bifocal and
trifocal gl****es
provide two or
three different refractive indices...
