The eyes are the sense organs of
sight. They detect light so we can see shapes and colours, and estimate
distances. We see and look the world around us, but we never stop to think how.
Your eyes are almost like a ball. The circle in the centre of your eye is
called iris (can have different colours), the small spot in its centre is
called the pupil. The pupil is like the window of a room, it can open wide or
shut narrow to let just the right amount of light come inside the eye, so when
you are in a dark room, your pupil becomes bigger to let more light in.
Nevertheless, if you move to a place with more light, the iris will shrink to
allow only the required amount of light. This light passes through the cornea
and lens to fall onto the retina. The retina is a super sensitive surface with
lots of optic nerve endings. These nerves take the upside down image from the
retina to the brain, which must first invert it and then make sense of it. The
information captured by receptors in the retina travels to the brain through
the optic nerve. The brain receives and interprets this information.
The pupil and the lens
continuously keep adjusting so that you can see the clearest image of the
world. For some people, these adjustments are not enough but these problems can
easily be corrected using glasses.
However, all of this is different
for aliens. The eyes are the sense organs of smell. They use them to breathe
and to detect different smells in the air. They captured the smell by the
nosesenotril, which form is really similar to the pupil. The openbig is like
the iris, which allows to make the nosesenotril bigger if the alien wants to
breathe or smell something in a deeply way. The smell and the air passes
through the neaco and the jint until they reach the natire, where the
information captured by the receptors travels to the brain through the nose
nerve. The brain receives and interprets this information.
