Difference between revisions of Diopters
Jump to navigation
Jump to search
(→Cylinder: change variable to P for power, instead of F for focal power, since f is used for focal length) |
|||
| Line 141: | Line 141: | ||
Induced prism can be calculated using Prentice's rule. Similar to Vertex Distance, decentration is less of an issue for smaller power lenses. | Induced prism can be calculated using Prentice's rule. Similar to Vertex Distance, decentration is less of an issue for smaller power lenses. | ||
The amount of prism P induced by decentration c of a lens of power f is | The amount of prism power P induced by decentration c of a lens of power f is | ||
<math>P=cf</math> | <math>P=cf</math> | ||