Page 24 - The Indian Optician Digital Edition September-October 2021

COOPERVISION DREAMLITE Researchers from the

LENSES ACQUIRE CE MARK American Chemical Society
(ACS) have now found a
solution. A research team
CooperVision Specialty EyeCare’s Procornea DreamLite night including Ahmed Salih, Haider
lenses have been successful in slowing the progress of myopia. Butt and colleagues, reported
These orthokeratology contact lenses have recently received infusing contact lenses with
European approval for the same by acquiring the CE mark. gold nanoparticles to create a
safer way to see colours.
The contact lenses can be used for myopia control in children
who have a refraction of -0.75D to -5.00D and a cylindrical To make the contact lenses,
refraction with a maximum of -2.50D. the researchers evenly mixed
gold nanoparticles into a
According to CooperVision, the DreamLite night lenses are hydrogel polymer, producing
currently available in Europe, the Middle East and China, and rose-tinted gels that filtered
are considered to be the leading design under the EyeDream light within 520-580 nm, the
brand, in the UK. wavelengths where red and

Dr Juan Carlos Aragón, president, CooperVision Specialty green overlap. According to
EyeCare, reveals that the increasing frequency and prevalence the research team, contact
of myopia is one of the most discussed issues in eye health. lenses with 40 nm-wide gold
He further explains that the World Council of Optometry too nanoparticles were the most
has advised optometrists to incorporate a standard of care for effective as these particles did
myopia management into practice. not clump or filter more colour
than necessary in the tests.
“The latest CE Mark will help eye care professionals to Besides this, these lenses had
communicate with even more confidence about DreamLite water-retention properties
lenses’ ability to slow the progression of myopia,” says Dr Aragón. similar to those of commercial
ones and were not toxic to
CooperVision also said that in a two-year study, the
DreamLite night lenses showed reduced axial length growth cells growing in petri dishes in
by 63% among high myopes, compared to the single vision the lab.
spectacle lens control group, a total reduction of 0.32mm. Later, when the researchers
compared their new material
to two commercially available
pairs of tinted glasses, and their
CONTACT LENSES FOR previously developed hot-pink
dyed contact lens, they found
CORRECTING COLOUR BLINDNESS that the gold nanocomposite
lenses were more selective in
People who are born with the genetic disorder colour blindness the wavelengths they blocked
have difficulty in seeing specific colours. They cannot differentiate than the glasses.
between red and green shades easily and often, see the world in
muted shades such as gray sky, gray grass etc. Red tinted glasses The team concluded that
can help these people see better but these lenses are cumbersome the new gold nanocomposite
and the lens material cannot be made to fix vision problems. lenses would be suitable for
people with red-green colour
Keeping this in mind, researchers shifted to the development issues without the probable
of special tinted contact lenses. However, even though the risk factors. The next step is
prototype hot-pink dyed lenses improved red-green colour to conduct clinical trials with
perception in clinical trials, they leached dye, which led to fears human patients to evaluate the
and doubts about their safety. comfort of the lenses.

| SEPT-OCT 2021 | 20 CONTACT LENS NEWS