EnChroma Colour Blindness Glasses - Adult - not eligible for VAT relief

£187.50

EnChroma lenses are engineered using a revolutionary lens technology developed in the early 2000’s by a glass scientist and UC Berkeley educated mathematician. 

Developed to increase the contrast between the colour signals, alleviating symptoms of colour blindness for a richer experience of the world. Colour blindness can cause each person to see colour differently, colour blindness glasses are designed to improve the colour vision of people with forms of red-green colour blindness, they are not intended to assist the vision of people with blue-yellow colour deficiency.

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) colour cones 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%.

The Science Behind EnChroma Lens Technology

EnChroma develops optical lens technology that selectively filters out wavelengths of light at the 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 colour discrimination along the so-called “confusion line” for that individual.

Our lens technology increases 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. Learn more about the accidental discovery of this revolutionary lens technology.

EnChroma lens technology increases contrast between the red and green colour signals, alleviating symptoms of colour blindness for a richer experience of the world.

Will EnChroma Colour Blind Glasses 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 glasses are designed to improve colour vision of people with forms of anomalous trichromacy, which are estimated to comprise four out of five cases of colour blindness. 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 colour discrimination 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 glasses are designed to address forms of red-green colour blindness and are not intended to assist the vision of people with Tritan-type deficiency. Fortunately, most cases of colour blindness respond well to EnChroma spectral lens technology, enabling the perception of bright, vibrant colour.

Take a free Colour Blindness Test

A colour blindness test is quick and simple you will be shown a series of images, you simply select what number you see. The images will be similar to the ones shown below:

 The EnChroma Colour Blind Test is specifically designed to determine your type of red-green colour blindness (deutan or protan) and level: mild deutan or protan, moderate deutan or protan, or strong deutan or protan. However there are limits to what can be tested with a self-administered online test. If you believe that you may have a colour vision deficiency, EnChroma recommends getting a complete eye exam by a qualified eye care professional.

To find out if the EnChroma colour blindness glasses could help you, you can take a brief colour blindness test, please follow the link below, this will take you to EnChroma's website:

EnChroma Colour Blindness Test

Types of Colour Blindness

Colour blindness or colour vision deficiency (CVD) includes a wide range of causes and conditions and is actually quite complex. Usually when people talk about colour blindness, they are referring to the most common forms of red-green colour blindness, which are genetic conditions caused by a recessive gene on the X-chromosome, but there are other types as well.

Red-green colour blindness can be broken down into two main types: Protan-type (“pro-tan”), which is a disorder of the first “prot-” type of retinal cones also called the L-cones, and Deutan-type (“do-tan”) which is a disorder of the second type of retinal cone also called the M-cones.

Protan Colour Blindness

Protan Colour Blindness (“pro-tan”) is an anomaly of the “L” cones. The “L” stands for Long Wavelength Light, which is generally seen as red light, mainly responsible for seeing red colours. In Protan-type CVD, the spectral sensitivity of the L-cone is shifted toward shorter wavelengths, so that it does not receive enough red light, and receives too much green light compared to a normal L-cone. Protan-type CVD includes protanomaly, which is a partial shift of the L-cone, and protanopia, which is a complete shift of the L-cone. It is estimated that about 25% of cases of red-green colour blindness are of the protan type.

A person with protan type colour blindness tends to see greens, yellows, oranges, reds, and browns as being more similar shades of colour than normal, especially in low light. A very common problem is that purple colours look more like blue. Another common issue is that pink colours appear to be gray, especially if the pink is a more reddish pink or salmon colour. Another symptom specific to protan colour vision deficiency is that red colours look darker than normal. For example, if red text is printed on a black background, it can be very hard to read because the red appears to be very dark.

Those with Deuteranomaly colour blindness may mistake purple for blue.

Deutan Colour Blindness

Deutan Colour Blindness (“do-tan”) is an anomaly of the “M” cone. The “M” stands for Medium Wavelength Light, which is generally seen as green light. In Deutan-type CVD, the spectral sensitivity of the M-cone is shifted toward longer wavelengths so that it effectively receives too much red light and not enough green light.

A person with deutan colour vision deficiency may experience confusions between colours such as green and yellow, or blue and purple. Another common symptom is that green traffic signals appear to be a very pale green or sometimes white. Common colour confusion also occurs between pink and gray or white, especially if the pink is similar to a light purple.

Tritan Colour Blindness / Tritanomaly

Tritan Colour Blindness (“try-tan”) includes tritanomaly and tritanopia. It is also sometimes called blue-yellow colour blindness. Tritan colour blindness most commonly acquired later in life due to aging of the eye or a medical condition such as glaucoma and is only very rarely inherited from birth. Tritan colour vision is generally characterized by a reduced sensitivity in the blue-sensitive “S” cone cells. “S” stands for Short Wavelength Light. The retinal S-cone cells make up only about 1% of the approximately 6 million retinal cone cells, so when they are damaged or not functioning properly, it can easily cause a degradation to colour vision. Typically a person with a tritan-type colour vision deficiency does not see blue colours well, and may have difficulty seeing the difference between blue and green. Cataracts, glaucoma, and age-related macular degeneration can cause symptoms of tritan colour blindness. Another factor that causes reduced sensitivity to blue is the yellowing of the crystalline lens within the eye: these cells do not regenerate and over a lifetime of exposure to light, especially UV light, the lens tends to become yellow in appearance and block the transmission of blue light, interfering with colour vision. Eventually this yellowing also leads to cataracts that must be treated surgically.

Monochromacy and Achromatopsia

Monochromacy and Achromatopsia describes a range of conditions that include rod-Monochromacy, S-cone Monochromacy and Achromatopsia. Sometimes these are collectively referred to as types of achromatopsia, as the word “achromat” meaning “no colour.” However, not all cases of achromatopsia have “no colour” vision. Similar to other forms of colour blindness, achromatopsia can be graded as incomplete (partial) achromatopsia or complete achromatopsia (total colour blindness). Achromatopsia is often associated with light sensitivity, photophobia, and glare sensitivity. In some cases, low vision disorders such as progressive cone dystrophy or retinitis pigmentosa can cause a gradual deterioration of colour vision that eventually turns into complete achromatopsia.

Trichromats, Dichromats, Monochromats are terms used in the vision science community to refer to different possible configurations of the human visual system having three (tri-), di (two) or one (mono) channel of colour information. However, these terms are simplified to a great extent, because the true capability of a colour vision system also depends on the degree of overlap between the channels, “perceptual noise” within the channels, and the cognitive processing capability for deciphering these signals in the visual cortex of the brain. Most cases of colour blindness are considered anomalous trichromacy which means they are effectively operating at somewhere between trichromat (normal colour vision with 3 channels) and dichromat (2 channels).

The EnChroma Colour Blind Test is specifically designed to determine your type of red-green colour blindness (deutan or protan) and level: mild deutan or protan, moderate deutan or protan, or strong deutan or protan. However there are limits to what can be tested with a self-administered online test. If you believe that you may have a colour vision deficiency, EnChroma recommends getting a complete eye exam by a qualified eye care professional.

To find out if the EnChroma colour blindness glasses could help you, you can take a brief colour blindness test, please follow the link below, this will take you to EnChroma's website:

EnChroma Colour Blindness Test

Our family of EnChroma Cx lenses are uniquely engineered for the most common types of colour blindness and different lighting conditions to optimise your colour vision throughout the day.

What’s the difference between Outdoor and Indoor lenses?

EnChroma Cx3 Sun Lenses are designed to enhance colour vision outdoors in bright sunlight or partly cloudy conditions and also serve as sunglasses delivering 100% UV blocking and glare protection. EnChroma’s Cx3 Outdoor lenses deliver the maximum colour enhancement effect due to the combination of bright colourful light and their lens technology. Available in Cx3 Sun for: mild, moderate, and strong Deutan Colour Blindness and Cx3 Sun SP for: mild, moderate, and strong Protan Colour Blindness.

EnChroma Cx2 Shade Lenses are an ideal choice to enhance colour vision in partly cloudy or cloudy conditions. When Cx3 Sun lenses would be too dark, select Cx2 Shade. People who live in cloudy geographical regions or dislike very dark sunglasses will find the most benefit from this lens type. Cx2 Shade lenses provide 100% UV blocking and glare protection and are uniquely tuned to deliver the same vibrant colour as Cx3 Sun lenses, even in the lower light conditions. Available in Cx2 Shade for mild, moderate and strong Deutan Colour Blindness and available in Cx2 Shade SP for mild, moderate and strong Protan Colour Blindness.

EnChroma Cx1 Indoor Lenses are designed to be used in typical indoor lighting conditions to enhance colour vision while performing activities such as school work, cooking, watching movies, browsing the web, and art projects. The Cx1 Indoor lenses best manage the effects of low light in conditions of less brightness and available colour. Two custom lens types, Indoor and Indoor DT, are tuned to the special needs of either protans or deutans, to ensure the right solution. For best results, the glasses should be used with bright, full-spectrum lighting.

Features:

Proprietary Spectral Lens Technology: Our award-winning lens technology is the result of more than a decade of pioneering research by EnChroma scientists, and is uniquely engineered to enhance colour vision for people with colour vision deficiency.

Scientifically Formulated And Designed in Berkley CA: EnChroma’s eyewear is made in our medical device manufacturing facility where EnChroma technicians perform 100% of lens machining, assembly, and quality verification using a combination of imported and US components.

Best In Class Lens Material: Our lens material is made with Trivex®, an optical-grade resin that delivers a best-in-class combination of impact protection, lightness, and clarity.

100% UV Protection: EnChroma lenses block 100% of the UVA and UVB radiation components in sunlight. According to the World Health Organization, UVA rays are unfiltered by the atmosphere and can cause the most damage to vision health.

Ultra Touch Anti Scratch Coating: To ensure a long service life free of scratches, our lenses are clad with an optically clear, thermal-crosslinked coating to provide added lens durability.

Clarity Enhancing Anti-Reflective Coating: Lenses without anti-reflection coatings reflect up to 12% of light back into your eyes. EnChroma lenses feature dual-surface anti-reflective coatings to reduce reflections by more than 90%.

Super Hydrophobic Top Coat: This water-repellent surface treatment makes the lens slippery so that dust and dirt can be easily removed with a quick wipe of the included microfiber cloth.

Extras: Signature box, hard case, EnChroma® cleaning cloth, microfiber carrying bag, user guide, and colourful balloons included.

Do You Wear Prescription Glasses? Try the Receptor Fitover to conveniently wear EnChroma glasses over your existing prescription eyewear.

Do You Wear Contact Lenses? Our standard (non-prescription) eyewear can be combined with your existing contact lenses to deliver comprehensive colour and clarity correction.

100% Satisfaction Guarantee: EnChroma backs up every purchase with our 60-Day Money Back Guarantee and 2-year Warranty.

Please Note: EnChroma glasses are an optical assistive device for enhancement of colour discrimination in persons with colour blindness; they are not a cure for colour blindness. Results vary depending on the type and extent of colour vision deficiency per individual.