How the Human Eye Works Analogous to a Camera Essay

Exclusively available on IvyPanda Available only on IvyPanda

Introduction

The functionality of eye components is very similar to that of a camera. Each component of the eye plays a crucial role to provide a clear vision. This section will discuss how the human eye works analogously to a camera. As a camera, the cornea part behaves like the lens cover. This part can be described as the main focusing element of the eye which has the capability of taking light divergent rays and bends these rays through the pupil (Pasadenaeye, 2011). The pupil is found in the center of the iris, these two parts play a similar role to that of the aperture of a camera.

We will write a custom essay on your topic a custom Essay on How the Human Eye Works Analogous to a Camera
808 writers online

The lens part of the eye is similar to the lens in a camera. It helps in focusing light on the back section of the eye. This is similar to the camera lens which focuses the light to the film which is normally at the back of the camera. The back section of the eye is known as the retina which functions similar to the film section of the camera. The function of the retina is to change the rays of light into electrical signals. After this conversion, it sends these signals to the brain through the optical nerve. The brain does the work of image processing that helps human beings to see the images in an upright manner (Pasadenaeye, 2011).

Vision defects

There are normally four types of vision defects namely astigmatism, nearsightedness, presbyopia, and farsightedness. This section will only deal with three types of vision defects. These defects cannot be considered as diseases but as minor defects which can be rectified easily. These defects usually disappear when individuals are in their twenties because this is the time when the human eyes get their normal shape and size.

Nearsightedness

The scientific name of nearsightedness vision defect is myopia. People suffering from myopia defects are unable to see distant objects. However, nearby objects are very clear to them. This does not mean that people with this defect have excellent or perfect near vision and imperfect distance vision. In extreme cases, nearsightedness individuals are unable to see things. In nearsighted eyes, the rays of the right are focused before they reach the retina and the focal point created by these rays of right will start to diverge thus creating a blurred image (Palsson, 2008). In a normal eye, the rays of light focus on a point/spot on the retina. The focal point of nearsightedness eye lies in front of the retina due to their elongated size.

Farsightedness

The scientific name of farsightedness vision defect is hyperopia. This defect is contrary to myopia. Individuals suffering from this defect can see things that are at a distance more clearly compared to things that are close to them. In the farsighted eye, the rays of light reach the retina before coming to focus thus creating a blurred image. That is, the focus occurs behind the retina (Palsson, 2008). In this context, the eyeballs of individuals experiencing this defect are normally too short, therefore, cannot handle the refractive power of its optical arrangement. People suffering from this defect usually do not realize it until they are middle-aged. At this age, they start having problems seeing at close distances. This is why many middle-aged people are using reading glasses yet they were not using them at younger ages.

Astigmatism

Individuals suffering from this defect see everything distorted irrespective of the distance. The cause of this defect is the irregular shape of the cornea. The astigmatic eye cornea is normally curved in an irregular form resulting in different refractory powers (Palsson, 2008). The numerous refractory powers distort the sight because some rays of light focus behind the retina while others focus in front of the retina. As a result of this, the retina will never receive a sharp image.

Lens needed to correct vision defects

Vision defects can be corrected by the use of lenses and the individual suffering from them will be in a position to see like a normal person. Due to the advancement of technology, other methods can be used to solve problems associated with vision defects. For instance, LASIK surgery can offer a permanent solution to these defects (Palsson, 2008). Nearsightedness can be solved by the use of a negative lens. Here, the negative lens is used to lessen the refractive power. The negative value of the lens depends on the level of nearsightedness. The more extreme it is, the higher the negative value is supposed to be.

1 hour!
The minimum time our certified writers need to deliver a 100% original paper

To correct the farsightedness a positive lens is required to add refractive power to the optical system. Compensation of the insufficient refractive power of farsightedness can be solved by the use of a neutral lens. Astigmatism can be corrected by the use of asymmetric or cylindrical lenses which will assist in compensating for the asymmetry of the eye’s lens.

Reference List

Palsson, J., 2008. Eyes Vision Defects.

Pasadenaeye, 2011. How does the human eye work?

Print
This essay, "How the Human Eye Works Analogous to a Camera" is published exclusively on IvyPanda's free essay examples database. You can use it for research and reference purposes to write your own paper. However, you must cite it accordingly.
Removal Request
If you are the copyright owner of this paper and no longer wish to have your work published on IvyPanda.
Request the removal
Need an custom research paper on How the Human Eye Works Analogous to a Camera written from scratch by a professional specifically for you?
808 writers online
Cite This paper
Select a referencing style:

Reference

IvyPanda. (2022, April 28). How the Human Eye Works Analogous to a Camera. https://ivypanda.com/essays/how-the-human-eye-works-analogous-to-a-camera/

Work Cited

"How the Human Eye Works Analogous to a Camera." IvyPanda, 28 Apr. 2022, ivypanda.com/essays/how-the-human-eye-works-analogous-to-a-camera/.

References

IvyPanda. (2022) 'How the Human Eye Works Analogous to a Camera'. 28 April.

References

IvyPanda. 2022. "How the Human Eye Works Analogous to a Camera." April 28, 2022. https://ivypanda.com/essays/how-the-human-eye-works-analogous-to-a-camera/.

1. IvyPanda. "How the Human Eye Works Analogous to a Camera." April 28, 2022. https://ivypanda.com/essays/how-the-human-eye-works-analogous-to-a-camera/.


Bibliography


IvyPanda. "How the Human Eye Works Analogous to a Camera." April 28, 2022. https://ivypanda.com/essays/how-the-human-eye-works-analogous-to-a-camera/.

Powered by CiteTotal, easy essay citation generator
More related papers
Cite
Print
1 / 1