$650 for EnChroma’s top prescription model. Before you spend it — or talk a parent into spending it — you need to understand one thing: color blind glasses don’t restore normal color vision. They shift it. Whether that shift helps depends entirely on your type of color deficiency, the severity of it, and what tasks you’re hoping to improve.
The viral videos of people crying when they see a rainbow for the first time are real. So are the people who wear the same lenses and notice almost no difference. Both outcomes happen. Here’s what separates them.
How Color Blind Glasses Work
The lenses use spectral notch filtering — they cut out specific wavelengths in the overlap zone between the long-wavelength (L/red) and medium-wavelength (M/green) cone response curves.
Normal color vision relies on three overlapping cone sensitivities. In red-green color blindness, the L and M cones have shifted response peaks that overlap more than normal — so the brain receives ambiguous signals and can’t distinguish certain reds from certain greens. By filtering out the wavelengths in that overlap band, the lens increases the contrast between L and M cone signals. The visual system receives cleaner, more separated inputs.
Think of it as removing the middle frequencies from a chord to help you hear the individual notes more distinctly. The notes are still the same — you’re just reducing the muddy overlap.
Who Gets the Most Benefit
This matters. Don’t skip this section.
Anomalous trichromats (deuteranomaly and protanomaly) are the best candidates. They have all three cone types — one is just shifted. The filter has something to work with. Mild-to-moderate anomalous trichromats typically see the most dramatic improvement. Some report that colors appear more vivid, that they can finally tell red traffic lights from green without relying on position, or that they can distinguish berries in green bushes.
Dichromats (protanopia and deuteranopia) are missing one cone type entirely. There’s no shifted response to sharpen — the signal is simply absent. Some dichromats report modest improvement in specific color naming tasks, but the benefit is generally much smaller. The viral videos disproportionately feature anomalous trichromats, which skews public perception of how effective these glasses are for the broader color-blind population.
Tritanopia (blue-yellow deficiency) is a fundamentally different cone pathway issue. Current filter glass technology is not designed for it, and there’s minimal evidence of benefit.
According to NEI data, red-green color deficiency affects approximately 8% of men and 0.5% of women of Northern European descent — the vast majority of whom are anomalous trichromats rather than dichromats. So most people with red-green color blindness are in the better-candidate group.
Brand Comparison and Costs
| Brand | Price Range | Notes |
|---|---|---|
| EnChroma (outdoor, non-prescription) | $200–$450 | Most studied; multiple frame styles |
| EnChroma (indoor/screen) | $200–$300 | Lighter filter for indoor environments |
| EnChroma (prescription add-on) | +$150–$200 | Adds Rx to existing frame |
| Pilestone | $30–$200 | Budget option; multiple filter strengths available |
| VINO Optics | $300–$500 | Medical-grade filters; designed for clinical colorimetry testing |
| Colorlite | $400–$600 | Custom-fit; European brand, requires professional evaluation |
EnChroma is the most prominent brand in the US market and has the most independently published testing data. Pilestone is a substantially cheaper alternative with less published research. VINO Optics is used in clinical and occupational settings — the $300–$500 price reflects a more rigorous fit process through vision care providers.
What the Research Actually Shows
Here’s where marketing and science part ways.
EnChroma’s own published testing shows improvements on the Farnsworth-Munsell 100 hue test and the Ishihara plate test for many users. These results are real — but they’re from EnChroma-funded research.
Independent studies have been more mixed. A 2018 study published in Optics Express by researchers at the University of Granada tested EnChroma lenses on 48 color-deficient participants using rigorous psychophysical methodology. The result: the lenses did not significantly improve color discrimination on objective measures for most participants, though some subjects reported subjective improvement in specific color-naming tasks.
A 2020 study in Ophthalmic and Physiological Optics similarly found that while filter glasses improved performance on Ishihara plates (a color blindness screening test), performance on more rigorous color arrangement tests was not significantly improved. The authors concluded that filter lenses may help with specific color identification tasks but don’t produce broad-spectrum color vision normalization.
The AAO’s position on color blindness notes that no treatment currently exists that corrects color deficiency — and describes filter lenses as quality-of-life aids that may benefit some patients for specific tasks, rather than medical treatments.
The honest takeaway: these glasses help some people with specific tasks — particularly color identification and naming. They don’t normalize color vision. And they work better for some individuals than others in ways that are genuinely difficult to predict before trying.
Some optometrists keep demo pairs of EnChroma or similar lenses available for in-office trials. If your doctor has them, take advantage — 15 minutes in the office under real lighting conditions is much more informative than any online description. EnChroma also offers a 60-day return policy for direct purchases, which substantially reduces the financial risk of trying them at home.
Prescription vs. Non-Prescription Options
If you wear glasses, you have two paths:
- Non-prescription lenses only — you’d wear the filter glasses over your regular contacts, or instead of your prescription glasses when color tasks are the priority. Awkward but cheaper.
- Prescription filter lenses — EnChroma and some other brands can incorporate your Rx into the filter lens. Adds $150–$200 to the base cost. More practical for daily wear.
Not all prescriptions are accommodatable. High myopia, high astigmatism, and complex prescriptions may not be feasible in every frame/lens combination. Check with the brand’s lens lab before ordering.
Free and Low-Cost Alternatives
If you’re primarily looking for functional tools rather than a perceptual experience, free and low-cost digital tools accomplish a lot:
- Seeing AI (Microsoft, free) — identifies colors in real time using your phone camera; announces color of objects including fabric, food, and surfaces
- Color ID apps (multiple, free) — point-and-name color identification via smartphone
- iOS Accessibility Color Filters — built into iPhone; helpful for screen color discrimination
- Colorblind Avenger app — real-time camera color identification with spoken output
These tools won’t give you the emotional experience of seeing a vivid red sunset, but they solve most of the practical functional problems that color blindness creates.
Color blind glasses do not satisfy the color vision requirements for many occupational licenses. Pilots, electrical workers, law enforcement, and some military roles have specific color vision standards — and wearing filter glasses does not meet those standards even if it improves your test scores on some plates. If you’re pursuing a career with color vision requirements, consult an aviation or occupational medicine eye specialist who can evaluate your specific situation under the applicable standards.
Frequently Asked Questions
Only while wearing them. Color blind glasses work by filtering light as it enters your eye — they're an optical aid, not a treatment. The moment you take them off, your color perception returns to your baseline. There's no evidence that prolonged use creates any lasting change in color discrimination. Some users report a brief perceptual aftereffect when removing the lenses (colors temporarily looking different for minutes), but this fades quickly and represents a normal neural adaptation response, not permanent change.
Deuteranomaly and protanomaly — the anomalous trichromat forms of red-green color deficiency — respond best. In these conditions, all three cone types are present but one is spectrally shifted, causing the red-green confusion. The spectral notch filter in color blind glasses increases separation between the L and M cone response signals, which is useful when both cone types are present. Dichromats — people with protanopia or deuteranopia who are completely missing one cone type — typically see much less benefit because there's no shifted cone response to sharpen. Tritanopia (blue-yellow deficiency) operates through a completely different mechanism and is not well addressed by current filter technology.
Yes, with appropriate guidance. There's no safety issue with children wearing filter lenses. EnChroma and other brands make children's frames. The practical question is whether a child's visual system has matured enough to benefit — most eye care providers are comfortable recommending them for children over age 5–6. Worth discussing with your child's eye doctor before purchasing, both to confirm the type of color deficiency and to set appropriate expectations. The AAO notes that color blindness is not a disease requiring treatment, but quality-of-life aids like filter glasses are reasonable to try.