Related Clues:
- Light-bending crystal
- Perspective provider
- Optical device used to invert an image
- Main part of a monocle
- Glass in a monocle
- Glass in glasses
- Optical separator
- Means of clarification
- Telescopic __
- Transparent optical devices
- Dark cloud; shining light
- Light-splitting device
- Light-focusing device
- One focusing light
- Part of photographer's equipment in French town