Fritz Day

Fritz Hollwich was a pioneer in the field of light research. He discovered the "non-visual" pathways of the optic nerve, proving beyond a shadow of a doubt that light passing through the eye controls a majority of biological systems, including our circadian rhythm, sleep/wake cycles, liver function, kidney function, heart function, brain function, and the production of key hormones and neurotransmitters throughout the entire body.

Square frames with subtle upper and lower curves and a retro keyhole bridge. This black frame is for those wanting a bold style yet with refined touches.

Fit: Medium/Small



BUNDLE & SAVE - Buy Day and Night Lenses Together and Save $45 On Your Second Pair.

All orders receive a complimentary lens cloth & luxury travel case
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Protect Your Health

Finding yourself inside, staring at screens day and night? You need to protect your health from the damaging effects of all that artificial blue light. Ra Optics glasses are scientifically-proven to block 95-100% of artificial blue light, saving you from poor sleep, eyestrain, headaches, and feeling fatigued.


Why Ra Optics

For years I searched for a treatment that would heal - not mask - my underlying health issues. What I uncovered changed everything about the way I thought about light, sleep and my health. Keep reading to learn how Ra Optics’ Blue Light Blocking Glasses have made all the difference.


What makes our glasses so effective?

We started with science then made it stylish. Our glasses have been developed with leaders of photoscience, neuroscience, and optics. They are infused with pigments that have been tested and retested for effectiveness. We personally know they work, but many leaders in health and fitness can attest to that too.