The Alberta Lens™ 2 contact lens material is suitable for a variety of patients who require extended hours of daily wear. Due to sufficient rigidity and high transmissibility of oxygen, the lenses allow the eye to maintain its metabolic function without inducing corneal edema or spectacle blur. These materials are designed from wettable, cross-linked siloxanyl copolymers with others and possess optimum properties for gas permeability, wettability, stability and durability.
The Alberta Lens™ 3
The Alberta Lens™ 3 contact lens material
is uniquely designed for problem patients who are unable to wear a regular
gas permeable lens. The Alberta Lens™ 3 material is structured from several
precisely refined siloxanyl monomers and copolymerized with others to enhance
gas permeability while retaining essentially the same wettability and stability
features as that of the The Alberta Lens™ 2 material. This material is
suitable for extended hours of daily wear.
The Alberta Lens™ N
The Alberta Lens™ N contact lens material
is a first in the generation of fluorocarbon-siloxanyl copolymers. The
incorporation of fluorocarbon and siloxanyl groups in the matrix of the
copolymer plastic enhances high oxygen permeability. Its teflon-like, non-adhesive
properties are resistant to protein and lipid bond deposits. The surface
of the lens is uniquely designed to possess good wettability by the combination
of basic and acidic wetting agents. It is very comfortable and designed
for patients with high oxygen permeability requirements.
The Alberta Lens™ SM2
The SM2 contact lens material is designed
from the same monomers as The Alberta Lens™ S material except, it
is more durable and is more suitable for multiple applications for sphere
and toric lenses*. The SM2 material also contains a UV absorber which absorbs
UV light in the region of 290-360 nanometers; the UV light in this region
is the most damaging to human eyes. Contact lenses made from the SM2 material
are adaptable to a wider spectrum of lens applications.
The Alberta Lens™ S
The Alberta Lens™ S contact lens material
is the "state of the art" generation in contact lenses. This is a patented
polysulfone copolymer material with high oxygen permeability and extremely
good wettability and stability. The material is uniquely designed to block
damaging light in the region of 290-360 nanometers (ultraviolet) to prevent
the creation of cataracts. Because polysulfones are highly biocompatible
with human body tissue, a lens from polysulfones is very comfortable on
the eyes from the initial moment of wear. This material is designed to
resolve the problems of even the most sensitive eyes.
The Aquasulfone Lens™
The Aquasulfone Lens™ is uniquely designed
from a sulfone monomer and a siloxanyl methacrylic monomer of the type
that when immersed in an acidic environment, produces a layer of HEMA on
the surface of the finished lens. This material has been designed by marrying
the most biocompatible monomer (sulfone) with the most wettable monomer
(HEMA) which is produced by hydrolysis on the surface of the lens. Due
to its biocompatibility and wettability The Aquasulfone Lens™ material
shows its superiority on the patient's eyes. The excellent wettability
of this material provides a cushioning effect resulting in greater comfort
to the patient. This rigid gas permeable material produces high quality
lenses providing sharp optics and visual acuity.
The Aquasil Lens™
The Aquasil Lens™ is produced from a unique
type of siloxanyl methacrylate monomer which, when immersed in an acidic
environment, produces a layer of HEMA on the surface of the finished lens.
In The Aquasil Lens™ the hydroxyl groups of HEMA are permanently bonded
to the polymer plastic which ARE NOT REACTIVE. Please note the silicone
monomer used in the construction of The Aquasil Lens™ is exclusively patented
by Progressive Optical Research Ltd. for its application in contact lenses.
The Aquasil Lens™RSP
The The Aquasil Lens™RSP contact lens
material is designed by copolymerizing oxygen permeability agent monomers,
hardening agent monomers, wetting agents and cross-linking agents. The
distinguishing feature of the RSP material is that it employs two wetting
agents - one acidic and one basic. These wetting agents are copolymerized
into the matrix of the polymer to give a balanced pH surface of the lens
while increasing wettability for the desired comfort. The technologically
advanced design of the material gives stability to the lens.
The Aquasil Lens™PS
The Aquasil Lens™PS is the highest oxygen
permeable material that we produce. It is designed from the same monomers
as the The Alberta Lens™"S" except the composition of the monomers
is uniquely combined to give high oxygen permeability with the Dk in the
range of 93. This material is very effective for patients who require high
oxygen transmissibility through the lens and is especially suitable for
high plus lenses. The Aquasil Lens™PS material does not contain a UV blocker;
however, upon request, it can be custom made with a UV absorber. The biocompatibility
of polysulfone monomer in The Aquasil Lens™PS gives exceptional comfort
to the user.
©1995 by Progressive Optical Research Ltd.
