Lesson: Vision Physics • 9th Grade

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.