Ra Optics Clyde Sunset

Ra Optics puts its Sunset lens in premium frames made from Italian acetate and German stainless steel. Ra states the lens filters more than 99% of light from 380 to 540 nm, with very low transmission below 530 nm, rising through green to near-full transmission by about 600 nm. If that holds, it cuts deeper into green than Sleep Swannies, which pass 23% at 540 nm in their lab report.

The trade-off is brightness. Ra says Sunset passes only 23% of visible light. The dark orange Uvex and Swannies lenses passed about half in independent tests. Expect a dim, warm view that makes small print harder to read in a low-lit room.

No independent measurement of Ra lenses has been published. Ra shows its spectral data as images on the product page rather than a third-party lab report, so its numbers are the maker’s own.

Prescription support is narrower than Swanwick’s or Bon Charge’s. Ra makes single-vision lenses only, with sphere from +2.00 to −6.00 and cylinder up to −2.00, and can’t make bifocals or progressives. The Clyde costs $174 without a prescription, $224 as readers and $294 with prescription lenses. The non-prescription version was on pre-order when checked. Ra offers 30 days of free returns or exchanges and a one-year warranty.

Choose Ra if you want a premium frame with a strong red-orange lens and a straightforward prescription. For progressives, look at Swannies or Bon Charge.