[Sleep Lenses]

Fritz Sleep

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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


For prescription eyeglass orders, please ensure that your prescription includes a pupillary distance (PD), is not expired, and has a power range of +2.00 to -6.00 spheres and up to -2.00 cylinder. Otherwise, your order may be substantially delayed or we may cancel and refund your order.
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All glasses orders include a luxury branded case and cleaning cloth, and free U.S. shipping, returns, and exchanges.

Customer Reviews

Based on 4 reviews
Meredith McPherson
They really work

These glass do exactly what Ra claims they do. Price was the only reason I gave 4 stars. There are other brands for way less that will also filter blue light. I’m happy with these but I will look elsewhere for daylight glasses solely based on price point

Extremely High Quality, Amazing Customer Support

Normally, I don't do reviews but Ra-Optics had pretty exceptional service. I ordered both Fritz Sleep and Fritz Screen lenses, and they were both very nice. The sizing on the Fritz was a little too small for my liking, so I chose to do an exchange for the Maxwell. The exchange process was super smooth and fast. I already have both Maxwell glasses and have been loving them. I noticed I slept better the first night of using the sleep glasses after sunset. Overall great quality product and fantastic customer support.

Peter Kennedy
RA OPTICS’ Products never disappoint

Was so happy with my day lenses that I made a second purchase of night lenses. RA over delivers again, I also purchased the Light Diet course and am anxious to go thru the material. Thank you again for the health education, quality products and service.

Thank you so much for your kind words, Peter! We are so grateful that you are benefitting from our products. Please do not hesitate to reach out if we can be of assistance.

Dimitri Hawksford

Fritz Night


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.