Optics of the Human Eye Experiment

Optics of the Human Eye



INTRODUCTION
The objectives of this experiment to investigate image arrangement in the human centerfield and determine how the visual defects of the eye is correct.
Theory
How lenses Form Images
As come passing through antithetical veridical, it refracts differently and moves with different speeds. Light enters the lens at the search surface and leaves at the back surface.
Lenses and Focal Length
In enervated lenses, light intersects further away. So it is said long focal length. In strong lenses, light intersects at a of a sudden distance. So it is said short focal length. The amount by which light is bent is quantified by the lenss focal length.
The principal focal length of a lens is firm by the index of refraction of the glass. Curvatures of its front and back, refraction of its material determine the focal length of a lens. We separate the lenses as convergent and divergent lenses. A divergent lens makes plan of attack parallel lights spread and a convergent lens makes approach path parallel lights come together. Below you can see the shapes of these lenses and how lights fight when passing through them.

Figure 1

Image and Image Distance
In converging rays we see the real images.



It is formed by the light passing through the lens. It can be seen directly. In diverge rays we see the practical(prenominal) images which be formed by unreal lines. It cant be seen directly. You can see virtual image located at the point where the rays appear to be coming from.
The images which behind the lens are the real images and gravel positive image distance. The images which in front of the lens are the virtual images and have negative image distance.

Figure 2
quarrys and the Object Distance

Objective
We will examine an eye model and study the visual problems.
Equipment List
Human Eye Model
Light Source
Tape Measurer
Lens Set
Retina Screen
Pupil Aperture
Foam Lens Holder

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