I was watching a video in my biology class about Darwin and
his ideas about evolution. The video described how creationists had tried to
use the eye as evidence of a supreme creator, because how else could something
so complex and perfect evolve from something so simple? This problem even
stumped Darwin and in his book “Of the Origin of Species” he even outlined a
few steps as to how he thought the eye might have evolved from a simpler form.
Even scientists had trouble tracking the path that brought the eye to where it
is today, because soft tissues such as the eye don’t usually fossilize. But
evolutionists have since been able to challenge the creationists argument all
thanks to the blind spot. The fact that there is a blind spot just proves that
the eye is not a perfect organ. When something evolves it can only go off of
what is already there and that is why it is not perfect. The video described
some example of the imperfections in the eye. The optic nerve in our eye
evolved to connect to the brain by a small hole in the retina, and this small
hole is what causes a blind spot near the center of our eye sight. Another
example of an imperfection is the fact that the blood vessels and nerves in the
eye sit right in front of the retina, and this makes images less sharp, because
it interferes with the way the light reaches the optic lense. The last example
of how the eye did not evolve perfectly that the video described, was how there
are two layers of the retina the top layer, which collects light, and the
darker layer the lines the back of the eye. The imperfection here is that these
two layers are not connected and so as we age we can actually have a retinal
tear. This causes the liquid in the eye to fill the hole in between the two
layers, this can cause retinal detachment and even blindness. I thought that
this was a very interesting video and I liked how the eye was connected to an
argument between creationism and evolution, and I liked learning that the eye
really isn’t perfect and how it might have evolved from just a few light
sensitive cells millions of years ago.
(This is the video but forward it to about four minutes in)
No comments:
Post a Comment