| 摘要 |
Supplemental optics (200, 210) supported by a frame (250) for surface viewing that can e releasably secured to the water-side of a twin-domed diving mask (100). The twin-domed diving masks are optimized for underwater viewing (and may not provide in-focus viewing above water). The supplemental optics (200, 210) provide in-focus above water vision in conjunction with these masks. |
