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Frequently Asked Questions

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For customers on a budget, we also occasionally have discounted certified refurbished glasses available.

Go to the Order Status page to view the current status of your order. If you created an account on our website, you can review your past orders and check your order status by logging in to My Account.

What does the order status mean?

  • Pending Payment. The order has been received, but has not yet been paid for. The order will begin processing after payment is received.
  • Processing. The order has been received and paid for, and is now processing. Typically, we can ship in-stock items within 1-2 business days. Fit-to-frame and prescription glasses typically take 5-10 business days to process.
  • On Hold. Something is wrong with your order and it has been placed on hold until we resolve the issue. Please email us at
  • In Manufacturing. The order requires a custom manufacturing process, which is currently in progress.
  • In Rx Manufacturing. The order requires a prescription lens, which is currently being made.
  • Completed. The order has been completed and shipped. Within the next 24 hours, you should receive an email that includes your tracking number.
  • Cancelled. The order was cancelled before it could be completed.
  • Refunded. The order was refunded because of a return or exchange.

How do I make changes to my order?

If you want to make changes to your order (including address changes and shipping changes) or if you just have questions, please send an email to Include your order number in the subject line.

How do I cancel my order?

To cancel an order, please email Include your order number in the subject line. Prescription and Fit-to-Frame orders can be cancelled provided that manufacturing is not started. All other orders can be cancelled at any time before they ship.

EnChroma is not affiliated with VSP Vision Service Plan.

EnChroma is aware that some people with color blindness have a strong desire to pass screening tests in order to gain access to occupations where good color vision is required. We are also aware of the existence of certain devices on the market that claim to help people overcome these tests, however there is no evidence that these products are safe to use in color-critical occupations and they are not accepted by any regulatory authorities.

EnChroma’s mission is to make make lens products that help people see color better that are also accepted by the vision science community as being scientifically valid, effective, and safe for use in a broad range of situations.

We believe that our lenses can help on certain types of tests which are used in occupational screening.  The details of which tests and under which conditions success can be expected is a subject currently being studied. EnChroma is currently engaged in collaborations with medical and scientific professionals to establish these results and to establish accepted protocols for administration of color vision tests with our assistive lenses.

These studies are a necessary step in order for our products to gain acceptance by regulatory authorities to permit their use in restricted occupations. However, since these studies are still in progress, we cannot at this time recommend the use of our products with color vision tests, nor for use in occupations where there are specific requirements on color vision acuity, such as emergency first responders, marine, pilot and public transport operations.

If you are a professional involved in administration of color blindness tests and are interested in conducting trials with the EnChroma lens, please contact us by email at

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Clip-ons are a great way to add the EnChroma Cx functionality on top of a standard prescription eyeglass.

This is not available from us yet but we are currently working on finding a suitable method for filling this need.

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All EnChroma lenses come with a premium anti-reflection coating, with a hydrophobic top-coating.

Anti-reflection coating: A clear glass or plastic material is not entirely clear because a portion of the light bounces off the surface. When you see your reflection in a window, you are seeing the light which is is being reflected from the surface instead of passing through. For a standard glass or optical plastic, about 92% of the light is transmitted through the material, and the remaining 8% is reflected. An anti-reflection coating (or “AR coating”) increases the transmission to over 98% by reducing the reflectivity to just 1-2%. This greatly increases the visual clarity by eliminating distracting reflections from the surface of the lens.

Hydrophobic: A property meaning that the coating repels water. If the the lens gets wet, the water will “bead” and roll off the lens, instead of spreading out and sticking to the surface. Hydrophobic coatings have a “slippery” feeling.

We believe this will eventually be possible, but there is no concrete timeline as to when it could be available.

Incorporating the EnChroma technology into a contact lens will require rigorous testing to prove that the resulting product is 100% bio-compatible.

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Transitions is a registered trademark of Chromea7, a company that makes photochromic lenses.

We are investigating the possibility of incorporating photochromic optics with the EnChroma Cx technology, but it is currently not known if they are compatible.

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The EnChroma Cx is not polarized. We expect it will someday be possible to make our lens including a polarizer but there is no estimate yet as to when that will be available.

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Reducing the overall light level makes color vision tests more difficult. The EnChroma sunglass lens is generally considered too dark for use with a computer display, so one should not necessarily see an improvement in test score with the eyewear. When used outside in bright daylight, the reduced brightness does not have this potentially negative impact on color perception.

We are currently working toward development of lenses that will be effective in a broader range of conditions including on computers, but there is no concrete timeline for when that will be ready. Subscribe to our newsletter to get informed about new product developments when they are announced.

Tritan-type color vision deficiencies (tritanomaly and tritanopia) are not as common as the red-green type of deficiencies (deutan and protan). Sometimes tritan CVD can be congenital but is more frequently something that develops later in life due to early formation of cataracts or glaucoma, or simply the natural aging of the efficiency of the eye. However, the EnChroma color blindness test when self-administered is not a reliable medical diagnosis. Please contact an eye care professional for more information.

The EnChroma lens actually enhances all primary color simultaneously including red, green and blue: not just red and greens. In principle it should help for tritan cases (blue-yellow CVD) in addition to deutan and protans (both red-green CVD).

We have done some testing with tritan-type deficiencies with positive results, but we don’t have enough data yet to make a firm prediction for your case.

The approximately 20% of cases who are not helped by EnChroma are usually those with very strong deficiency (called dichromats)–if you are a mild to moderate case of any type then it will probably be effective.

With the EnChroma lens, colors appear brighter and more saturated. People report that their color discrimination is faster and more accurate, they are able to see more vibrant colors. They are more likely to notice objects that are differentiated against a background based on color (such as a flower against background of leaves), whereas without the lens those objects would have been overlooked.

In our user trials, people with color blindness also noticed that the EnChroma lens helped them to differentiate textures and hues within a single shade of color—for example the pattern of different shades of green on a leaf, or in a complex textures such as a hillside covered in trees may appear to be “less noisy”.

Based on our product effectiveness studies, we have found that EnChroma glasses are effective for about 80% of cases of color blindness.  The results vary depending on the type and extent of color vision deficiency. You can get an estimate of your type by taking our online test at

EnChroma is currently available in some locations, however the number of locations is still very limited. Most of our customers choose to buy the product online from our website–if it does not help your color vision the glasses can be returned within 60 days.

To check for a location near you please consult our retailer list: EnChroma Retailers.

If your EnChroma order doesn’t work out for you, you can return it within 60 days of the date of shipment.


  • Returns must be in their original condition with all original elements including the packaging. If the item is damaged or incomplete, EnChroma may refuse to accept the item or assess a restocking fee in accordance with the cost of restoring the item to its original condition.
  • Refunds include the price you paid for the item plus any California sales tax you paid.
  • Refunds do not include any shipping costs or international import fees.
  • You are responsible for paying return shipping costs.
  • For Fit to Your Frames orders, you must return your eyewear so that we can remove the lenses and mail the frames back to you. A restocking fee will be deducted from your refund to cover our costs.
  • Your return must include your original receipt.

For returns, your package must be postmarked within 60 days from the date of original shipment from EnChroma. Late returns may be refused or assessed a restocking fee, depending on the circumstances.

EnChroma cannot refund any shipping costs or international import fees related to your order. However, many countries refund all or part of import fees for returned imports. If you return your EnChroma order, contact your local customs office to ask about import fee refunds.

To request a return, email Be sure to include your order number in the subject line.

We’ll process your return within 5-10 business days after we receive it, and you should receive your refund within 4 weeks of the date you put your package in the mail. (Typically, it takes 5-10 business days for us to receive your return, 5-10 business days for us to process the return and issue a refund request to your bank, and then 5-10 days for your bank to process our request and refund your payment. Fit to Frames returns might take an extra 5 business days to process.) We’ll notify by email as soon as we issue the refund request to your bank.

The EnChroma Cx lens was invented under NEI-sponsored research conducted by Dr. Don McPherson. NEI is the National Eye Institute, a division of the NIH. This research, carried out under an SBIR (Small Business Innovation Research) grant in three phases, included clinical trials of early stage prototypes at UC Davis Eye Center and at the UC Berkeley School of Optometry.

The findings of the study are that scores on the Farnsworth D15 test can be improved for some individuals, provided that 1) the light source is an accurate simulation of natural daylight and 2) the type and severity of the color vision deficiency are within the range that responds well to correction. In addition, subjective testimony was collected in the study which demonstrated clear benefit of the eyewear to color deficient individuals in real-world situations.

We have also examined the efficacy of the eyewear on color blindness screening tests such as the Ishihara plate test. Results here are mixed: these tests are “pass-fail” screening tests and are designed to be extremely difficult to catch even the most mild cases. A person with strong color vision deficiency may enjoy a boost to their color perception while wearing EnChroma, yet still show evidence of mild deficiency under testing–therefore they will still fail. Our position is that improvement to color vision cannot be measured meaningfully with a screening test. Furthermore, such tests are used in occupations where public safety is a concern (e.g. public transport operators), and therefore should not be circumvented. EnChroma glasses should be used to for improvement of quality of life and color vision generally, and not for the purpose of bypassing an occupational restriction.

In our experience with in-house product testing and our customer base, we have observed that results with EnChroma vary depending on the type and severity of color vision deficiency.  Certain cases of very strong color blindness are, unfortunately, simply too strong to help. These cases, called dichromats, make up about 20% of the population of people with color vision deficiencies.

To get an estimate of how well EnChroma glasses will help you, use our online color blindness test to estimate the type and severity of your deficiency. Visit to get started.

Since the first scientific recognition of color blindness in the 1790s, numerous inventions and therapies have been attempted to correct for color blindness. The first color blindness glasses were created by James Maxwell in the 1850s. These glasses featured a lens that was tinted red on top, clear in the middle, and green across the bottom. Since the red lens transmitted only red light and the green transmitted only green light, reds and oranges appeared brighter through the top lens and darker through the bottom. The idea was to determine the color of an object by comparing the relative brightness of its appearance in each section of the lens.

Around the time of World War II, public awareness of color blindness greatly increased as people were needed to fly in airplanes for the military. Flying a plane (especially at night) requires good color vision, so those with CVD were excluded. Consequently, the market was flooded with “cures” for color blindness offered by unscrupulous proprietors who promised that their product would allow those with CVD to pass a color blindness test. These ranged from benignly fraudulent treatments to outright dangerous procedures such as injecting snake venom into the eyes. Currently, there is no cure for color blindness. Furthermore, although some devices are sold with the claim that they will help the wearer pass a color blindness test, occupational testing is required for reasons of public safety and should not be circumvented.

Since the 1970s, a variety of lens products have been marketed which take the form of tinted lenses applied monocularly or binocularly with different tints in each eye. The tints are usually a strong red, purple, or pink color. Often the tint is put into a contact lenses, making the lens relatively discreet. According to vision science these devices work on the principle of binocular rivalry (disruption of depth perception) and do not fundamentally improve color vision. In other words, they are similar to James Maxwell’s glasses or the 3D glasses you wear at the movie theater. They can disrupt depth perception and alter brightness so that the wearer can detect an analog for color, but they don’t deliver more accurate color vision. Due to the low risk and possible benefit to some individuals, the FDA has permitted such devices to be sold provided that they are clearly labeled that 1) they are not a cure for color blindness and 2) have minimal therapeutic effectiveness.

EnChroma lenses are based on a unique approach to color blindness correction: restoration of the spectral separation between cones using a narrow-band notch filter. The effect works for people with forms of anomalous trichromacy, which are the majority of cases (about 80%).

Unlike conventional color-tinted lenses that distort colors — emphasizing one color at the expense of others — EnChroma lenses amplify the perception of all three primary colors (red, green, and blue) simultaneously. The result is a “boost” to the chromatic saturation (purity or vividness) of colors.

You will need a medical professional to certify that “the expenses are a direct result of a medical condition,” and that the expense is to alleviate that condition. A form for documenting that is provided here:

Many EnChroma customers have successfully claimed coverage under the U.S. FFSA guidelines. However, please note that EnChroma does not guarantee validity of such claims.

There are many different providers of vision insurance, and their coverage & plans vary. Some insurance plans provide a general benefit that can be applied to any prescription sunglass lens. If so this benefit may be applicable to the EnChroma Cx lens which is also a type of sunglass lens intended for outdoor use.

Please contact your insurance provider to find out if EnChroma lenses are covered.