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Enchroma Lens Basic Information

The following attributes apply to all lenses made and sold by Enchroma

UV Protection 100% UVA/UVB/UVC
Lens Blank Diameter 72mm
Scratch-Resistant Hard-Coating Included
Anti-Reflection Coating Included
Hydrophobic Coating Included

Enchroma Standard Lens Specifications

Enchroma provides the Standard Lens with general-use non-prescription eyewear, unless otherwise specified.

Lens Material Mid-Index Acrylic Monomer
Refractive Index 1.56
Abbe Number 40
Optical Power Plano

Enchroma Lenses

For more information about the lenses see the Lens Guide.


Dark Sunglass Lens

VLT 14% (Filter Category 3)
Lens Color Dark Gray

Medium Sunglass Lens

VLT 25% (Filter Category 2)
Lens Color Medium Gray

Indoor/Computer Lens

VLT 65% (Filter Category 1)
Lens Color Light Blue

Enchroma Prescription & Safety Lens Specifications

Lens Material Polycarbonate
Refractive Index 1.58
Abbe Number 30
Single Vision Rx SPH -4 to +3CYL -4 to +4 (recommended range)
PRISM to +8
Rx must include binocular or monocular PD.
Extended range jobs are evaluated on a case-by-case basis and subject to frame compatibility issues.
Bifocal Rx ADD +1 to +3, SEG HEIGHT 5-50mm
Bifocal type is a blended round 25mm.
Progressive Rx SPH -4 to +3CYL -4 to +4 ADD +3
Progressive design is IOT Alpha S45, a “soft+wide” free-form progressive design. Rx must include seg height. Monocular PD recommended.

Cross-Section Diagram


Enchroma provides the Standard Lens with general-use non-prescription eyewear, unless otherwise specified. These eyewear should not be used when direct impact to the eye is likely, such as in contact sports, shooting and industrial-safety eye protection.

The Enchroma Standard Lens is made of a UV-cured acrylic monomer. The lens contains added UV-absorbing dyes to ensure that it is 100% UVA/UVB/UVC absorbing. The lens is impact resistant but is NOT SHATTERPROOF.

Enchroma provides the Polycarbonate Safety Lens for pediatric (childrens’) frames, ASTM F803 sports-activity frames, and ANSI Z87.1 industrial safety frames. The Polycarbonate Safety Lens is provided in both non-prescription and prescription lens types.

The Enchroma Polycarbonate Safety Lens is made of polycarbonate, a material providing improved impact resistance, and is finished to 3mm minimum thickness. Polycarbonate lenses are naturally 100% UVA/UVB/UVC absorbing.

The Enchroma prescription lens is made of polycarbonate, a material providing improved impact resistance compared to acrylic and glass lenses. However, the Prescription Lens is not certified for use in high-impact or industrial safety applications unless combined with an appropriate safety-rated frame. The Prescription Lens is available in Single-Vision, Progressive and Bifocal lens types. The prescription polycarbonate lenses are naturally 100% UVA/UVB/UVC absorbing.

FDA Compliance Statement Per 21 CFR 801.410(c):
Enchroma lenses are tested for impact resistance using the drop-ball test per 21 CFR 801.410(c). Lenses block 100% of UVA and UVB radiation. Enchroma, Inc. is a Registered Medical Device Manufacturer as defined and required per 21 CFR 801.410(c).

Specifications given are valid as of March 22nd, 2015. Specifications are subject to change.