Clinical trials
prove that Colorlite's color vision
correction and enhancement lens coatings
result in significant improvement in
90% of color vision deficiency (CVD)
cases. Objective tests like Ishihara
plates or computer controlled color
vision tests demonstrate the improvement,
but only 25% of the subjects are convinced
right away of the Colorlite lens coatings'
positive effect, the remaining 75% is
hesitant. Therefore please read the
following arguments as to the impact
you should expect and experience when
using Colorlite lens coatings:
1. Change of Colors
The majority of
CVD patients see the world more colorful
through the corrective lenses and can
distinguish between more colors; however
their first impression is that colors
known to them before have slightly changed
and look strange at first. The eyes'
ability of being able to adapt both
to rapidly and slowly changing new environments
is well known. When we step into a dark
or artificially lit room from bright
sunlight then it is hard to see anything
at first, but after a few minutes the
environment looks normal again, because
the eyes adapt to the new condition.
CVD patients go though somewhat similar
experience when using Coloryte lens
coatings, therefore patients need time
to get used to the new colors. At young
age this process is quite short, it
can take from a few minutes to a few
days, depending on the type of the lens.
2. Level of Improvement
At the time
of taking the test the eyes are not
used to the lenses yet. Although the
test clearly shows the improvement,
most patients feel that the correction
is not significant and buying the lenses
have no benefits. However, it should
be emphasized that the improvement can
never reach 100%. Correcting human color
vision is like correcting any other
deficiency a person has: a prosthetic
limb can never make up for a missing
arm or leg but it significantly improves
the condition. It is important to note
that Ishihara-like pseudo-isochromatic
plates are designed to separate CVD
and normal vision patients. Consequently
only those CVD patients could reach
significantly better results on the
Ishihara plates whose color vision is
adjusted to the normal level. This is
rare; an improvement from a serious
CVD level to light CVD is a significant
achievement from the patient's point
of view and is noticable, but it can
be hardly demonstrated on the Ishihara
test.
 |
 |
| Before correction |
After correction |
| Level
of improvement |
3. Learning Colors
Learning is an essential
part of the correction process. Just
as one should learn to walk with an
artificial leg or learn to see with
an progressive lens one should equally
learn to identify colors with the corrective
lenses. Color identification and the
ability to name different colors is
a result of a learning process that
happens at a very young age at the time
of learning to speak. With the help
of the color vision corrective lenses,
color identification should be learnt
again.
4. Shining Lenses
Due to the tinting
technology coating procedure corrective
lenses is coloured which can be inconvenient
for some customers. The purpose of this
is to eliminate certain lights and modify
the light reaching the eyes so that
the receptors receive correct information.
Some patients find the coloured lenses
unattractive but if the lenses were
not be coloured the correction would
not be possible.
5. Diminished Light
Penetration
Some patients are
afraid that the color vision corrective
lenses prevent enough lights to reach
the eyes thus decreasing their vision.
Colorlite lenses let through 40% of
the lights, (as opposed to sunglasses
that lead through 5%), which creates
a hardly noticeable difference in brightness,
since the eyes are able to compensate
for brightness changes in the thousands,
and be able to adopt to the circumstances.
At artificial light, watching TV etc.
there is enough brightness, however
at dark we do not recommend using Colorlite
lenses.
6. Recognition by Authorities
At present Authorities
do not issue official document for users
of colour vision corrective lenses (driving
licence, pilot licence etc.). However,
approval to wear corrective coatings
to obtain professional licences may
take years. On the other hand there
are several professions where the authorities
do not limit that CVD people wear corrective
lenses, thus in everyday practice they
could manage their work better and easier
with corrected color vision - e.g. computer
is broadly used and uses mass of color
coded information
7. Frame
During choosing
best frame that suit the to our face
we should take into consideration that
the corrective lenses are less effective
if the frame is too small or narrow.
We suggest frames which provide the
best fit to the patient face and cover
the eye from every direction. We should
suggest the customer to check whether
the spectacle is adequate.
8. Wearing glasses
As the lenses do
not cure but enhance the color vision
that is why CVD individual experiences
enhancement only when he wears the glasses.
During the wearing the glasses the CVD
individual color vision can gradually
further improve.
