ChromaGen™ was developed by David Harris at the Corneal Laser
Center for Colour Blindness at Clatterbridge Hospital in Cheshire,
England. Dr. Chaaban Zeidan, an optometrist from Tamworth, England
together with Cantor & Nissel further developed ChromaGen™
for dyslexia, resulting in patent approval in 1997. ChromaGen Europe
is the official distributor of ChromaGen™, and
Maxine Morgan Europe is the official distributor of ChromaGen™
Unlike other programs, ChromaGen™ offers a range of eight coloured
filters, as opposed to other lenses such as X-chrom and ColorMax,
which only offer lenses for those with red/green colour blindness
and are not FDA approved. This Cantor & Nissel product is available
in both spectacle and contact lens modality.
The ChromaGen™ system of lenses has been awarded Millennium
Product status [by the Design Council in Britain] to recognize forward
thinking, challenging, creative and innovative products, and
highlight the best of British inventions.
ChromaGen™ and Dyslexia
Dyslexia is a condition in which affected people are unable to grasp
the meaning of written or printed words and sentences or to
read more than a few lines with understanding. It is believed
that Dyslexia could be a visual disorder as well as a neurological
disorder due to Magnocellular system abnormality. Problems can show
themselves in reading, writing, number work, short-term memory, hand
control and visual processing. Timekeeping, sense of direction and
interpersonal skills can also be affected. Approximately 16 percent
of the over 292 million people in the United States are affected by
some form of reading disorder that cannot be corrected by optical
correction (powered lenses).
In trials, the ChromaGen™ lens system has been shown to
be of benefit to those dyslexics who suffer from the perceptual distortion
of text that makes reading more difficult. These distortions include
blurring (that cannot be corrected by refraction), movement of the
letters or words, shimmering to the page, the words sinking into the
white background of the page, pattern glare, and patterns formed by
the spaces between words and lines that interfere with reading. Although
ChromaGen™ is a symptomatic treatment and the underlying neurological
condition remains unchanged, in the majority of these patients the
ease of reading is improved. Results of an in-office study performed
by Dr. Zeidan indicate that 91% of 434 patients showed over a 45%
improvement in speed-reading and writing abilities over a 6-month
period. Neuroscientist Professor John Stein has estimated that using
the special coloured filters of ChromaGen™ could help approximately
one in three people who suffer from visual dyslexia.
ChromaGen™ is a unique system of coloured lenses for dyslexia.
It provides a quick and reliable screening test for visual dyslexia.
When the patient selects the right colour combination during the assessment
an immediate improvement can be experienced including clearer text,
ease of reading and word and number recognition. As a result, text
typically becomes clearer and stays still on the page.
Dyslexic users of ChromaGen™ have reported:
When I read, I dont miss lines out as I used to and this
means I am faster at reading. And when I write I dont miss out
words. Thomas (age 7)
My speed of reading increased at once and I was able to read
without so much fatigue. The glare off the page had gone and my eyes
were soothed. Linda (age 46)
Instead of seeing a mass of undecipherable text, I can now see
the individual words. Sonsoles Herras (age 40), Madrid
ChromaGen™ and Colour
Colour deficiency, also known as colour blindness, is an optical condition
in which affected people have a deficiency in one or more of the primary
colours (red, green, or blue) recognized through the retina. There
are approximately 3.5 million people afflicted with colour blindness
in the United States. Ten percent of males and 0.6 to 0.8 percent
of women are colour deficient.
Colour deficiencies can be grouped into the following categories:
Deutrans (lack in green receptors), Protans (lack in red receptors),
Tritans (lack in blue receptors), Monochromatics (sees only 1 pigment),
and Achromatics (has no functioning cones). Defective colour vision
can range from near-normal ability to distinguish colours, where typically
the chemical for seeing red or green is slightly altered, to a high
degree of confusion, where the chemical balance is considerably altered.
In trials, over 97% of colour blind people reported a significant
enhancement to their colour vision and their everyday lives. For people
suffering from colour deficiency or 'colour blindness', ChromaGen™
haploscopic filters work by changing the wavelength of each colour
going into one or both eyes, which enhances colour perception and
colour discrimination. Improved colour vision may also lead to improved
safety through earlier identification of hazard warning lights and
brake lights on the roads.
ChromaGen™ users with colour deficiency testify:
I realized that some cars I thought were black were navy blue
or dark green. As I looked around, it was as if colours popped out
at me, especially orange, pink and fuchsia. I will be able to see
colours I was lacking. Nick A., New York
I used to think I had a genetic defect that just couldnt
be helped. Now I see everything in a new light. Flowers are just so
astonishingly beautiful they take your breath away. A.
How ChromaGen™ Works
It is believed that, in reading disorders, there is a problem with
the magnocellular pathway or 'wiring circuit' to the brain. The magnocellular
pathway consists of large nerve cells that form a path from the eye
to the brain. It is thought that these pathways differ in people with
reading disorders from those without reading disorders.
The magnocellular system carries important information about
timing and, if incorrectly formed, can scramble the information passed
between the eyes and the brain just like two fax machines that
are not quite communicating correctly. This results in the blurring
and distortion to writing that many dyslexics notice, and which others
may experience but do not realize is abnormal.
The fitting of ChromaGen™ lenses helps re-synchronize and selectively
changes the speed of the information in the pathways to enable sufferers
to improve their reading ability, handwriting and spelling.
In cases of colour deficiency, ChromaGen™ changes the level
of each colour going into the non-dominant eye and, in some cases,
both the dominant and non-dominant eye, enabling enhanced colour perception
and colour discrimination.
ChromaGens™ eight tints are available in spectacle and
contact lenses that are plano or prescription. In cases where only
one eye needs to be treated, one treated ChromaGen™ lens has
provided similar beneficial results. The examination process allows
patients of any age to experience the benefits of ChromaGen™.
All ChromaGen™ lenses are only available through Chromagen Europe (www.chromagen.us)
Available lens parameters are single vision, astigmatic and multifocal.
To hide the tinted lens, a mirrored or semi-mirrored finish is available
so that the best cosmetic effect is achieved.
Spectacles are of benefit for those patients experiencing ASD™
as they are only needed when reading or studying, whereas contact
lenses are worn consistently.
Spectacle blanks are available for frames authorized by Chromagen Europe. Marchon
frames are the Authorized Frames of Choice, including Calvin Klein,
DKNY, Fendi, Michael Kors, Coach, Nautica, Nike, Flexon, X Games,
ChromaGen™ Contact Lenses
ChromaGens™ lenses are Benz 55% water material and the
tinted area is only the pupil area of 5, 6 or 7 mm with a standard
BC of 8.60mm in 14.5 diameter. Single vision and toric contacts are
Contact lenses are cosmetically beneficial, as the pupil of the lenses
is tinted, and in most cases this tinting is undetectable.
ChromaGen™ Exam Kits
The ChromaGen™ Diagnostic System is available only to Licensed
Practitioners that have completed and received their official guild
certification for ChromaGen™. It comprises a full range of diagnostic
filters and a 25 contact lens trial set in the same colours as the
filters. This offers a choice of density of colour and of tint diameter
(5mm, 6mm & 7mm) to ensure optimum performance from the chosen
hue. This kit is sanctioned for the testing of both ChromaGen™
spectacle and contact lens use.
Chromagen Europe will distribute a special Detection Kit. This kit will be available
for the layperson, school workers, hospitals, and other individuals
or companies that would like to be able to test for ASD™. The
use of this kit will allow the user to determine whether ChromaGen™
will benefit the individual being tested. Once tested, the user will
be able to refer the individual to a certified ChromaGen™ Practitioner
for further testing.
Support for Practitioners
Practitioners of the ChromaGen™ haploscopic filter system are
required to attend training seminars. Seminars will provide training
into the techniques and subtleties needed to properly use the ChromaGen™
system. Guild Certified Practitioners will receive ChromaGen™
Certification and will be able to test and prescribe the necessary
lenses for their patients.
Once a practioner has been certified, there will be ongoing professional
seminars available. An ongoing professional back up service will be
available to Certified Practitioners.
Only qualified doctors who are certified through factory trained specialists
can dispense ChromaGen™. Chromagen Europe is authorized to screen and refer
practitioners to Cantor & Nissel. Each and every Certified Practioner
must purchase a special examination kit and agree to special conditions
to safeguard the patent.
Chromagen Europe will conduct training in groups of 50 or more doctors in key
cities throughout the country
Beginning in January 2006, Chromagen Europe will offer
a special incentive to doctors who register for certification before
June 30, 2006: a $ 2150 (full purchase price) rebate on examination
Certified Practitioners will have exclusive rights to dispense other
Cantor & Nissel products, such as unique fashion contact lenses
and prosthetic lenses.
To become a privileged Practioner, complete the registration form
and submit to your rep. or to firstname.lastname@example.org (mention the name
of your rep.) with a check or money order as soon as possible.
You will be contacted with a choice of dates for certification seminars.
To download Registration form in WORD document click here, save it,
fill all details and fax or send back as attachment by e-mail, email@example.com
Or print the following form to be able to fill
and fax back: ChromaGen Europe Fax: +31-180-623562
Printable Registration Form:
Practioner Name __________________________________________________________
Practioner License _________________________________________________________
Name of Practice __________________________________________________________
Address of Practice ________________________________________________________
Contact Telephone Number _________________________________________________
Contact Fax Number _______________________________________________________
Contact E-Mail Address _____________________________________________________
City and State choice for Training Seminar:
2) Vision Expo East ______________
3) Vision Expo West _______________
Years in practice ________________
Year graduated from license granting
Name of license granting organization
Familiarity with dyslexic or colour
deficient patients: Circle one: Yes / No
ChromaGen™ Examination Kit* $
Application and Administration Fee $ 250.00
Cost of Samples
Seminar / Training / Support
Non-refundable deposit $ 1000.00
Due at seminar or upon receipt of examination kit $ 2525.00
*Rebate of $ 60.00 on first 35 ChromaGen™
prescriptions, $ 2100.00
Please mail Registration Form with
check or money order payable to ChromaGen Europe.
Postbus 4344, 3006 AH, Rotterdam, The Netherlands.
Ask your rep for Credit Card Payments and Online Registration.
Please e-mail us to firstname.lastname@example.org
if you need more info.
Stedmans Medical Dictionary, 20th ed. Baltimore: Williams and
Stein, John and Vincent Walsh, 1997 To see but not to read; the magnocellular
theory of dyslexia, Oxford University;
Hodd, N. B. 2000 The Chromagen™ method for colour deficiency
and specific learning difficulties, Optometry Today - Optics Today;
Harrabin, Roger Dyslexics turn to coloured specs, BBC News, 2 July