the eyes...

The humanity needed millions years to be the machine more perfect and wonderful, but also all the animal are  big machine of synchronization, in this post I will written about the eye. The eyes is considerate one of the organ more complicated.

The principal function of the eye is transform a wave electromagnetic in an electrochemical impulses to  brain, when this organ process this sign and then we can see c: (obviously the process is more complicated).

In the some theories of evolution with respect to formation of eye. first a  bacteria was sensible to light, then years later present a structure that could see the preys but vaguely, like this the evolution of the eye was accomplished.  

The eye measure is around about 2.5 cm is located in the head and in the human we have two but in some animals present more of two or haven´t. is interesting how all the animal have a different form and the function.

The illnesses that you can have are many, but the principals are, cataract, Glaucoma, Refractive errors (for example Hyperopia and myopia), Conjunctivitis, etc. for warn this illnesses, is necessary have regular checkups. In some cases, the persons lost the sight for  old age.