Frequently Asked Questions

For prescriptions and Fit to Frames, allow 3-4 weeks processing time. Backorders and pre-orders ship when they come back into stock, usually 4-6 weeks. Other items usually ship in 1-2 weeks. Processing times can be longer depending on our current order volume.

If EnChroma experiences unexpected or sudden shortages in lens materials or frame styles, items that were not listed as “backordered” at the time you placed your order may become backordered by the time your order moves through the queue.

All EnChroma eyewear must pass a strict quality inspection before shipping. If an item does not pass inspection, we may need to re-make it for you, which can cause a delay.

If your order is delayed for more than 30 days, we’ll email you to let you know. If you require your order by a certain date, please email to find out if your order can arrive by the date you need.

To view the status of your order, see the Order Status page. To learn what each order status means, see What is the status of my order?

What if I have questions or changes?

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. For address or shipping changes, write “URGENT” in the subject line.

How do I cancel my order?

To cancel an order, email Include your order number in the subject line. Prescription and Fit to Frame orders can be cancelled at any time before manufacturing. All other orders can be cancelled at any time before they ship.

Use our Order Status page to view the 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 1-3 business days, but it can take up to 5-10 business days depending on our current order volume or if the item is on backorder, processing might take longer.
  • 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 step, 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.

What if I have questions or changes?

If you want to make changes to your order (including address changes and shipping changes) or if you just have questions, please send a detailed 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 at any time before manufacturing. All other orders can be cancelled at any time before they ship.

Dubai is a unique city that has no postal codes, however UPS requires a postal code to validate the address.

Try entering “00000” as your postal code. If this does not work, please contact customer service and provide the shipping and/or billing address that is giving you difficulty so we can try to fix it.

The lens has a premium anti-reflection and hydrophobic top-coating, which improves the clarity of the lens.

A side effect of this coating is that it makes the appearance of dirt or smudges more obvious. The lens is actually not any more dirty than normal, its just easier to see any smudges because of the unusual optical properties of the coatings.

Clean the lenses regularly using mild dish soap and water, or just the vapor from your breath on the lens. Wipe using a non-abrasive fabric such as the included cleaning cloth. Avoid touching the lens directly with your fingers as the oils from your skin will readily smudge the lens.

Sorry, but, our lab services are not part of the VSP lab program.

Because of the unique needs for production of the EnChroma lens, all lens processing must be done through EnChroma. In the future we expect that other labs will be able to process and fulfill your EnChroma Rx needs as well, but we are not currently offering this option and we cannot provide lens blanks for processing by other parties.

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

To stay up to date with news from EnChroma and product developments, please subscribe to our email newsletter at

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.

To stay updated with new product developments please subscribe to our newsletter

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.

To stay updated about new product development at EnChroma, please subscribe to our newsletter.

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.

To get informed about new products please subscribe to our newsletter.

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 yes as to when that will be available.

To get informed about new product developments please subscribe to our newsletter.

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.

EnChroma glasses are functionally sunglasses and work best under outdoor daylight. The darkening effect is a necessary part of how the filtering removes light from the spectrum to enhance color perception. As such they are obviously not usable in all situations as a “full-time use” lens.

We recommend that you wear the EnChroma glasses whenever you go outside. 1) this ensures that the lens is functioning with proper lighting, 2) the diversity of colors in the natural world is rich and will engage your visual cortex functions for color perception, and 3) doctors recommend wearing sunglasses as often as possible to protect the eyes from damaging UV radiation.  EnChroma glasses are qualified as sunglasses and are 100% UV-blocking.

Many customers have reported a “persistence effect” such that they feel their overall color perception is improved after wearing the EnChroma glasses for a long period of time (several months).  They start to notice colors “unaided” that they would not have noticed otherwise. We have not yet done a long-term study of color acuity to quantify this claim, however we believe this effect may be caused by neural plasticity (learning) in the visual cortex.

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

The EnChroma Cx lens causes a very powerful “super-color enhancement” effect. The same “boost” that it gives to the vision of a person with color blindness can be appreciated with normal color vision as well. In addition, the lens also has a neutral color balance, which means that your sense of color accuracy is not compromised or disturbed.

We have received testimonials from some customers who have normal color vision that the glasses have beneficial effects on their mood, such as from seasonal affective disorder. While this is an interesting potential application, this particular use case has not been studied in detail yet and we do not have any official claims that can be made regarding this use.

The EnChroma Team all wears the Cx Sunglasses, even though most of us are not color deficient–and we love wearing them!

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 30 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.

The names you see in our product catalog, “Apollo”, “Explorer”, etc, refer to the frame style. All frames we sell come with the same lens for color blindness correction, which is called the “Cx“.

Frame styles can be broadly classified according to their intended use:

  • Lifestyle frames are fashionable styles including the classic aviator and wayfarer. These frames work well with low to moderate power Rx prescriptions. These frames tend to fold to nearly-flat, enabling the use of slim cases that easily fit in pockets.
  • Sports frames are performance-oriented styles. They provide superior coverage–protection from stray light entering around the lens, as well as wind. They work for activities such as running, biking, etc. Specific sports such as baseball require special high-impact frames. Please note any appropriate activity restrictions. Our sports frames work well with Rx prescription lenses, including high power Rx lenses.
  • Kids frames are frames made in small and extra-small sizes to fit children and youth faces. The ones we offer are sporty and work well with Rx prescription lenses.

You can also get the EnChroma lens fitted in a third-party frame of your choice.

No products were found matching your selection.

Yes. The EnChroma Cx lens is fully compliant with limits on minimum brightness and chromaticity coordinates of traffic signals as defined by American National Standard ANSI Z80.3-2010. They perform well and as a non-polarized lens allow you to better see oil and other slippery surfaces on the road.

According to the European Union CE standard EN 1836:2005+A1:2007, the lens may be considered “not suitable for driving and road use”. We believe the CE fails to anticipate the technological capabilities of the EnChroma lens with the method used to quantify lens performance with respect to traffic signals.

Please use common sense judgement to ensure that the lens does not cause your color perception to be altered in such a way that it would be difficult to interpret traffic lights and signs.

If you’re interested in becoming a distributor or retailer for EnChroma products, fill out our distributor interest form. The EnChroma lens can be dispensed and prescribed according to standard procedures in the eyecare industry.

You can use EnChroma Cx-65 Indoor/Computer glasses for computers, TVs or other display devices. These are great as a second pair of EnChroma glasses, especially for deutans who have tried either the Outdoor or Indoor/Outdoor and found them to be effective. However, Indoor/Computer glasses are not recommended for strong or moderate protans.

Indoor/Computer glasses work best with computers and colored status/indicator lights on electronic devices, but have only a mild effect on most surface colors (such as printed photos). The lens is very light and has a bluish tint, which means they can be worn indoors and in nighttime conditions.

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.

Yes. Children are usually diagnosed with color vision deficiency when they enter grade school. In most school systems color vision screening is mandatory because it has significant effects on classroom learning.

EnChroma Cx glasses are available in a variety of pediatric styles. Check the recommended age-range for the frame prior to purchasing.

EnChroma Cx glasses in pediatric frames are fitted with polycarbonate lenses. Polycarbonate is the #1 doctor-recommended lens material for children due to its super-tough impact resistance.

Red-green color blindness is caused when the spectral response of the M-cones and L-cones are shifted so they are more overlapping than normal. The greater the amount of overlap, the more severe the color vision deficiency will be, and the harder it is to provide a corrective aid that is effective.

About 20% of cases of color blindness can be classified as types of dichromacy.  Dichromats are defined as individuals having a total (100%) overlap of M-cone and L-cone sensitivity. EnChroma works by creating a “spectral notch” that restores separation between the cones. However, if the cones are 100% overlapping then it is impossible for such a notch to have any effect. In essence, this case is simply too strong to correct. Types of dichromacy include protanopia, deuteranopia and tritanopia.

However, we have also found in product testing that some people nominally considered “dichromats” may actually be forms of strong anomalous trichromacy, meaning that the overlap is less than 100%. These people have very strong color vision deficiency, but are still able to get some help from the EnChroma lens. Typically a person with a very strong color vision deficiency will mainly see improvement in the color appearance of traffic signals but may not be able to get the “super color vision” experience in the natural world that is reported by persons with less severe impairment.

EnChroma’s online color blindness test can be used to estimate the type and extent of your color vision deficiency. On completion it will advise you of the probability that EnChroma lenses can help you. If the product does not help it can be returned within the 30 day trial period.

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.

Yes. If you normally wear glasses for correction of your distance vision, then you will want to get the EnChroma lens made with your prescription.

EnChroma glasses are intended for outdoor use which generally means they are not used for near-vision correction. So, if you only wear prescription glasses for correction of near-vision (e.g. reading, office work, etc), then you may not need to order the prescription lenses with EnChroma.

Prescription types:
Our glasses can be made with single vision prescriptions as well as bifocal and progressive corrections. You can order a frame with your prescription via our website, or via an authorized eyecare professional that carries EnChroma.

Normal Prescription range*:
Single Vision: SPH -4 to +2 CYL -6 to +6
Progressives: SPH -4 to +2 CYL -4 to +4 ADD +3

EnChroma Cx Prescription lenses are made from polycarbonate.

*Out of range prescriptions may be possible depending details of frame geometry. Please contact us for details.

Note: The EnChroma Cx Non-Prescription and Prescription lenses have the same functionality. You do not need a doctor’s prescription to buy the EnChroma Cx.

You can also get EnChroma with a “fit-over” frame called the Receptor–this can be worn over your regular glasses (see below).