Contact Camera Research Paper

Light is what helps us see every day, and without it we know that it would be much harder to observe our surroundings. Light helps us see the detail in objects and the beauty in our environment. Thanks to a few functions of our eye we can gather that light to form an image on our retina. For many people, eye sight tends to get worse as they age and corrective lenses are needed. Contact lenses provide a comfortable way to allow someone to see things with a 20/20 vision. To understand how the contact lens works, we need to first understand the basic functions of the eye. Starting from the front of the eye going to the back, we have our cornea, pupil, iris, lens and retina. Light first passes through the cornea, and like a camera it refracts that light for it to be focused. The pupil and iris then regulate how much light is to enter. Once the light goes past the pupil it goes through the lens where it modifies the light to form the image on the retina. The retina is then like the film of a camera and with the optic nerve sending signals back to the brain it can then form an image. The image becomes clear if the lens functions properly to focus the light rays. If the lens does not properly focus the light, corrective lenses …show more content…
For an astigmatism, the cornea is misshaped and there are two places in the eye where the light is focused. To fix this, a contact lens is made into the correct shape to account for the misshaped cornea. In the case of presbyopia, the eye muscles can lose their elasticity with age and typically a bifocal or multifocal lens is needed for this. These generally have different shapes or curves made into one lens. The inferior portion of the lens would be for reading or looking at objects up close, and the superior portion of the lens is made to see objects farther away (Physics Tutorial: Contact