الفهرس 
Chapter I: IntroductionOnly 14 pages are availabe for public view
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Abstract
Holmholtz’s theory of eye adaptation was widely accepted, and after that science used devices such as the corneal map device, the corneal refractive power measuring device, the corneal thickness measuring device, and the pentacam device to start talking to the cornea while adapting to the eye.
These recent details follow a wide debate among scientists about measurement methods, as well as the beginning of the differences that occur in the cornea as a result of the eye’s adaptation, and Pharmed, Loebing, and Weil were the first to begin studying what occurs in the cornea during the eye’s adaptation.
In this study, we measured many variables in the cornea during different degrees of eye adaptation - starting from 0 degrees up to 4 degrees of eye adaptation - which are (the anterior curve of the cornea - the posterior curve of the cornea - the total refractive power of the cornea - the thickness of the cornea - the diameter of the pupil - the depth of the cornea The front of the eye - the angle of the anterior cupboard) using a five-point camera device that relies on the Schemmflug system to photograph the cornea of the eye.
We also compared these variables between the eye with natural lenses and the eye with artificial lenses (a lens implanted as a result of cataract surgery in the same patient).
This study includes 20 patients aged between 20 and 40 years, and their gender varies between male and female.
At the end of this study, we analyzed the results using the SPSS program.
The results showed that corneal changes during different degrees of eye adaptation were very minimal in eyes with natural lenses and also in eyes with artificial lenses. Corneal variables can be considered constant during eye adaptation.
In future studies, we recommend that corneal variables be studied on a larger sample, and in different cases of the cornea.
We also recommend that the study be conducted on different age groups, that the focus be on the elderly group, and that corneal variables be studied before and after replacing the natural lens of the eye with an artificial lens in the same eye for the patient.