What makes us have a perfect crisp vision is a complex process that is easily explained when the retina, a tissue sensitive to the luminescence that is inside our eyes receives what we perceive of our environment through rays of light. These signals reach the brain by the optic nerve, in the form of electrical stimulation.
As a matter of example it’s like a screen where images are projected and which also involve a myriad of very important elements that integrate the organ of vision, we refer among other things to the cornea, the transparent structure of the eye, which together with the lens which is the lens located within the eye are responsible for diverting or “refracting” light rays from the outside and make them arrive perfectly focused.
Refractive errors are the most common alterations or problems in the eye, such as myopia (poor distance vision), farsightedness (poor near vision), astigmatism (distorted vision) and presbyopia (farsightedness). Its main symptoms can be blurred vision, itching or discomfort in the eyes, feeling of tension in sight and even headaches … or what is the same as not receiving electrical stimuli correctly and having our vision not as clear. When the defect is big, we can speak of pathological refractive errors. But usually these alterations can be solved with glasses, contact lenses or currently through surgery.
We will discuss all these problems in the following articles. The first refractive error we’ll talk about is myopia; Concerning those who can see close objects crispy clear but cannot clearly identify those that are at a greater distance.
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