| Answer | Crossword Clue |
|---|---|
| eyeglass | a lens used to aid vision |
| eyeglasses | EYEGLASS, a lens used to aid vision |
| microprism | a tiny prism used as a focusing aid on a single-lens reflex camera |
| microprisms | MICROPRISM, a tiny prism used as a focusing aid on a single-lens reflex camera |
| fisheye | A wide-angle lens with a field of vision covering up to 180░, the scale being reduced toward the edges |
| fisheyes | A wide-angle lens with a field of vision covering up to 180░, the scale being reduced toward the edges |
