4.2 Compare prisms to concave and convex lenses. 5.1 Define focal length. 5.2 Define optical center. 5.3 Solve second order optical problems. Students will understand the difference between lumens and candle power.
Students have knowledge of basic ophthalmic measurements.
7.1 Describe the inter-relationship between diopters and focal length. 7.2 Be able to convert inches, feet, and yards to millimeters, centimeters, and meters, also vice versa. 7.3 Be able to use the optical cross to solve power equations in placement of power on a lens.