The Eye

For me an amazing organ of the human body is the eye, because the sight it's the most used sense in our body, it allow us see everything that's happening in our days and life, and it's the principal organ in the visual system.

The eye it's like a camera, we have a kind of lens called crystalline lens where the light stimulus is caught until it reaches to a curved surface called retina, there the image that we're seeing is projected inverted. In the retina there are a specialized cells that convert the image into nerve impulses that travel through the optic nerve to the brain where the image is inverted in order to form the vision as we know it!

The eyes are located in our heads, down the eyebrows and between the nose and the ear on reach side of our face. They have spherical shape, approximately 25 mm in diameter and weighing aproximately 8 g.

The eyes are composed of multitude of little organs. The ciliary body, which has an fundamental role in the accommodation of the vision. The iris, that it's the colored part that we see in our eyes, and which it's perfored in the center by the pupil. The cornea that is the anterior part of the eye and transmits the light to the lens and the retina.

The illnesses that can alter the normal functioning of the eye are refraction problems, like myopia ansd hypermetropia, cataract, optic nerve disorders, diseases of retina, among others.

To keep the eyes healthy you have to eat fruit and vegetables, keep a healthy weight, don't smoke, use summer glasses to proctect them to UV-A and UV-B radiation, and let the take a rest.