Lesson Plan: Vision
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to describe how a human eye lens combined with artificial lenses focuses parallel and divergent incident light rays.
Objectives
Students will be able to
- recognize that light rays from a point at or beyond the far point of the human eye can be modeled as approximately parallel,
- recall that the near point of the human eye is the minimum distance of an object from the eye at which a sharp image of the object can be formed on the retina of the eye,
- apply the formula in all combinations, where is the optical power of a lens and is the focal length of the lens,
- recall that the diopter is the unit of optical power,
- recognize that the accommodation of the lens in the human eye is a deformation of the lens that allows the lens to vary its optical power,
- describe qualitatively the changes that occur to the lens of a human eye in order to form sharp images of objects on the retina of the eye where the distances of the objects from the eye vary,
- recall that myopic eyes do not form a sharp image at the retina of the eye for objects at or beyond the far point of the eye,
- recall that hypermetropic eyes have near points with significantly greater magnitudes than healthy eyes,
- describe qualitatively how convex lenses can be used to correct the vision of myopic eyes,
- describe qualitatively how concave lenses can be used to correct the vision of hypermetropic eyes.
Prerequisites
Students should already be familiar with
- the production of images by thin lenses.
Exclusions
Students will not cover
- lenses other than biconvex and biconcave lenses,
- astigmatism.
