Friday 10 August 2018

The eyes, incredibles and beautiful

Although the eyes are small in comparison to most of the organs of the body, for me they are incredible, their structure is complicated and they are beautiful! The view helps us, more than any other sense, to maneuver around the world that surrounds us.

In a single glance, which lasts a fraction of a second, the eyes collaborate with the brain to indicate the size, shape, color and texture of an object. They play one of the most important roles in my opinion: The eyes work together to perceive depth, which allows us to calculate the distance and size of objects to help us move around them. They also collaborate with the brain, muscles and nerves to create complicated images and visual messages.

And the eyes are constantly adapting to a changing environment; for example, they are adapted so that we can move easily in rooms that are almost dark or under the bright sunlight.The eyes are strategically located in our head, very close to the brain, as they work together. Only part of the eye is visible on a person's face. The whole eye, the eyeball, is approximately the size and shape of a ping-pong ball.



The eyes are also protected by tears, which lubricate and cleanse dirt that pass through the barrier of the eyelashes and eyelids.
According to research, the eyes of men outnumber those of women. Each eye has a sphere shape of 2.5 cm in diameter, the eyes of man being half a millimeter larger than those of a woman.


Some of the most frequent eye problems are the so-called refractive errors:

馃憖
The astigmatism. In astigmatism, there is a problem in the curvature of the cornea. This causes part of the image to be blurred.


馃憖 Myopia. Myopia occurs when the eye focuses the image of an object in front of the retina, rather than directly on it. In most cases, people do not see well from afar but can see with clarity up close


馃憖Hyperopia Hyperopia occurs when the image that arrives is not focused on the retina, but behind it. This makes it difficult to see nearby objects clearly, while distant objects look good


馃憖 B
lindness. It is about the loss of vision. Blindness can be temporary or permanent


馃憖Cataracts an opacity of the lens of the eye that prevents the images from being seen clearly or makes them not be seen at all

馃憖Color blindness is due to problems in the pigmentation of the retinal cones. Most people with color blindness confuse some colors, usually red and green.


馃憖 Dacryostenosis. is an obstruction of the lacrimal drainage system that occurs in the lower eyelid.


馃憖Glaucoma is a disorder that causes increased intraocular tension, with the potential to injure the optic nerve.


馃憖Conjunctivitis is a common contagious infection that causes inflammation (redness, pain and swelling) of the conjunctiva.


馃憖retinoblastoma. It is a cancerous tumor in the eye that usually appears in the first 5 years of life


馃憖strabismus. A condition where the eyes look misaligned


Proper eye care includes regular check-ups. Some of the signs that you may have vision problems include crossing or presenting differences in the orientation of both eyes, rubbing your eyes constantly, tearing, eye redness and having difficulty following an object with your eyes. Older children may squint, sit too close to the television or have trouble seeing the blackboard.

5 comments: