Vision defect called myopia

A person with myopia cannot see objects that are far away clearly.

Optical physics is very concerned with studying human vision, which by the way is quite complex. Some people have vision-related defects. The most common visual defects are myopia, hyperopia, astigmatism and presbyopia. Right now our focus is on the defect known as Myopia.

The basic element of our vision is therefore the eyeball, which is very similar to a camera. The eyeball is nothing more than a spherical box, which has a system of lenses at the front and a photosensitive membrane at the bottom, where the images of the various objects we see are formed.

Well, we can define Myopia as a defect that does not allow people to see clearly an object that is far from them. This defect occurs because, with the ciliary muscles relaxed, the eye’s image focus is located before the retina, that is, the image of a distant object forms before the retina.

The eye with the myopia defect has excessive convergence or an elongation in the direction of the anteposterior axis, which leads to a curving of the range of vision, with an approximation of the far point and the near point in relation to the normal eye. Therefore, we can conclude that the person with myopia problems has great difficulty seeing distant objects, however, close objects, see extremely well.

This visual defect can be corrected through surgery or through the use of lenses that diverge the light rays, that is, using diverging lenses.

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