Single Vision Lenses- provide all-purpose vision for non-presbyopic
patients. They have one fixed field of focus at either distance vision
(Driving), intermediate vision (Computer), or near vision (reading).
Single vision lenses also deserve consideration as a second pair of
glasses; to compliment a pair of multifocal lenses, as a task-specific
solution (ie. heavy reading usage).
More Information on
Single Vision Lenses
Go to top of page
Bifocal Lenses- provide two fixed fields of focus for the
presbyopic patient, usually distance and near correction; however,
intermediate and near correction use is increasing among users of
computers. Bifocals have two visibly distinct zones of vision seperated
by a segment line of varying widths and shapes. They provide a lower
priced solution for those needing help reading while still providing
vision for greater distances such as driving.
More Information on Bifocal
Lenses
Go to top of page
Trifocal Lenses- provide three fixed fields of focus (near/
intermediate/ distance) for patients with higer levels of presbyopia.
Trifocals have three visibly distinct zones of vision separated by two
segment lines of varying widths. They provide a solution for bifocal
wearers having trouble accommodating the intermediate vision through
either part of their bifocal. Trifocals are usually priced higher than
Bifocals.
More Information on Trifocal
Lenses
Go to top of page
Progressive Lenses- provide seamless vision at all distances for
the presbyopic. These lenses are variable focus with no visible lines,
and provide a more natural visual solution to presbyopic patients then
either of the lined mutifocal solutions. Progressive lenses vary widely
in price and in quality of lens design. Today there are as many as 50
different brands of progressive lenses available, with varying levels of
advantage and disadvantage. The newer lens designs available have made
great strides in ease of adaptation, ease of use, and wearer comfort;
successfully addressing the disadvantages of older lens designs, many of
which are still currently available , but usually for low price
consideration and/or insurance patient use. Progressive lenses offer the
best all-around, daily use solution to people needing help at all
distances.
More Information on
Progressive Lenses
Go to top of page
Task Specific Lenses-
are any lenses made to provide a
unique solution to a specific problem. Hobbyists, computer users, auto
mechanics, radiologists, pool players, musicians, golfers, etc., etc...
each has specific and unique problems in their visual requirements. For
each there is a unique solution not normally used for daily wear. These
may include lenses that have bifocals above AND below the eye for people
who work over their heads; a bifocal segment located in the outer
periphery of the glasses so golfers can have an unobstructed view of the
ball while still being able to see a scorecard. Specially design
progressive lenses which concentrate on the distances between 12 inches
to 10 feet for pool players, office workers, computer users, etc.
More Information on Task
Specific Lenses
Go to top of page
Aspheric/ Atoric Lenses-
expand the area of sharp vision
by correcting for the deteriorating effects on the optics of their
lenses inherent in higher prescriptions. They provide a clearer image
through the lens from edge to edge. Also have the cosmetic advantage of
thinner less "bulbous" looking lenses, while reducing the
"big eye" effect on far-sighted patients.
More Information on
Aspheric/ Atoric Lenses
Go to top of page
Lens Materials- There are many
different lens materials ranging from conventional plastic and glass; to
state-of-the-art High Index materials that make lenses thinner and/or
lighter than ever before possible. A lens' index of refrection is the
measure of how steeply a material bends light. The higher the index of
refraction, the more steeply it bends light; hence, the thinner the lens
can be made.
More Information on Lens
Materials
Go to top of page
Lens Coatings & Tints-
Just as with lens materials, there are a
variety of coatings and tints that can be applied to either side or both
sides.
More Information on
Lens Coatings & Tints
Go to top of page
|
