What it is?
Clyde Edgar Keeler was a medical geneticist who is noted for his work on laboratory mice and the genetics of vision. His work was instrumental in the understanding of retinitis pigmentosa.
Key Benefits
- Round shape, definite curves, clear saddle bridge in a modern transparent frame.
- Contemporary style, this is clearly the one for you.
- 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.
- 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.
What else you need to know
- Non-Prescription
- Fit: Medium
- All glasses orders include a luxury branded case and cleaning cloth, and free U.S. shipping, returns, and exchanges.
Ra Optics - Size Chart:
What is the right frame size for my face?
If you already have frames you like, then you can match them to a size we have. Frame size information is normally printed on the arms of your glasses, with 3 numbers. First is the lens diameter, then bridge width, and lastly the arm length. The frame size information for each of our styles is next to each image.
Understanding frame measurements:
Maxwell frames // Daylight lens
Frame size: 55-17-145
| Size | Lens width | Bridge width | Arm length |
| 55-17-145 | 55mm | 17mm | 145mm |
The most important measurement to know
If you don’t know the frame sizes, the most important measurement to consider is the full frame width – lens diameter + bridge width.
Full frame width = 127mm
Clyde:- Size: 47-19-145
- Total width: 113mm
