EnChroma at Park Vision…

What is Normal Colour Vision?

Normal colour vision occurs when white light, which contains within it all the colours of the rainbow, enters the eye. This light activates three kinds of photopigments, one in each of the three photoreceptors sensitive to different parts of the visible spectrum: blue, green and red.

What is Colour Blindness?

Most types of colour blindness occur when there is an excessive overlap of the M (green) and L (red) colourcones in the eye, causing distinct hues to become indistinguishable. As a result, the number of shades of colour a typical colour blind person can see may be reduced by as much as 90%. EnChroma optical lens technology selectively filters out wavelengths of light at the precise point where this confusion or excessive overlap of colour sensitivity occurs.

Couple wearing EnChroma glasses

5 Steps to experiencing truer colour with Enchroma

  1. Determine your type & severity of colour deficiency – Take our Colour Vision test in a relaxed practice environment.
  2. Identify your lens priorities – For indoors or outdoors? Prescription? In bright or shade? We can help you identify your needs with our lens guide.
  3. Try on Enchroma Lenses – Explore instore, indoors and out.
  4. Select a frame – Choose any of our frames or you can even use your own.
  5. Wear and experience your EnChroma eyewear and experience truer colours.

(Best results occur after a few days of wear, there is usually some adaptation required to allow your eyes to retrain their new colour perception)


The Science Behind EnChroma Lens Technology

EnChroma optical lens technology selectively filters out wavelengths of light at the precise point where this confusion or excessive overlap of colour sensitivity occurs. The M and L cones are altered in such a way that there is a greater amount of difference in colourdiscrimination along the so-called “confusion line” for that individual.

The lenses increase contrast between the red and green colour signals, alleviating symptoms of colour blindness for a richer experience of the world. With the application of science, optics, mathematics and more than 10 years of clinical research, EnChroma continues to advance the field of colour vision research and bring new products to market that solve unique colour deficiency issues.

Sunset, viewed with normal colour vision example

Sunset, viewed with colour blind vision example

Will EnChroma lenses work for me?

Colour blindness is not a singular condition. It encompasses a range of conditions, from mild to severe, that can cause each person to see colour differently. Enchroma lenses are designed to improve colour vision of people with forms of anomalous trichromacy, which are estimated to comprise four out of five cases of colourblindness.

The most common types are Protanomaly and Deuteranomaly, which are forms of partial red-green colour blindness. In the most extreme cases, the complete absence of one of the cone photopigments, called Protanopia or Deuteranopia, are considered dichromats who may see limited results due to the complete inability to see red and green colour differences. Reduced colourdiscrimination of shades of blue and yellow is called Tritanomaly, or Tritanopia which is not a type of what is commonly referred to as red-green colour blindness, but is also a form of colour vision deficiency. EnChroma lenses are designed to address forms of red-green colourblindness and are not intended to assist the vision of people with Tritan-type deficiency. Fortunately, most cases of colour blindness respond well to EnChromaspectral lens technology, enabling the perception of bright, vibrant colour.

To discuss EnChroma, or any aspect of your vision, contact us here.