US 11,940,675 B2
Spectral glare control eyewear for color blindness and low vision assistance
Andrew Schmeder, Richmond, CA (US)
Assigned to EnChroma, Inc., Berkeley, CA (US)
Filed by ENCHROMA, INC., Berkeley, CA (US)
Filed on Sep. 1, 2021, as Appl. No. 17/464,171.
Claims priority of provisional application 63/074,929, filed on Sep. 4, 2020.
Prior Publication US 2022/0075211 A1, Mar. 10, 2022
Int. Cl. G02C 7/10 (2006.01); G02C 7/02 (2006.01)
CPC G02C 7/104 (2013.01) [G02C 7/022 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An ophthalmic lens having a luminous transmittance between 60 percent and 85 percent, where the luminous transmittance is the weighted photopic transmittance of CIE Standard Illuminant D65 according to the CIE 1931 2-degree Standard Observer, the ophthalmic lens having a spectral transmittance curve comprising:
a maximum spectral transmittance between 460 nanometers and 510 nanometers less than 50 percent of the luminous transmittance;
a minimum spectral transmittance between 460 nanometers and 500 nanometers less than or equal to 1 percent;
a minimum spectral transmittance between 550 nanometers and 700 nanometers greater than 60 percent; and
a mean transmittance between 400 nanometers and 450 nanometers at least 4 times greater than a mean transmittance between 460 nanometers and 500 nanometers.