Subject: Evolution of Eye Tue May 13, 2008 6:05 pm
This is a response I made to the claim ;
The biggest flaw of evolution is the gap between human eye and other speacies,it is so complex and accurate and flawless that it must have been design intelligently.
Worng
I'm going to cover all aspects from accuracy to complexity....
But before that :
The Claim : Something is too complex or accurate => it must be created or intelgently designed
This is a logical fallacy ; I can't understand something => What I think is true.c.
Behe,himself says :
Quote :
The peril of negative arguments is that they may rest on our lack of knowledge, rather than on positive results. (Behe2003)
Before understanding the lightings "gods" were responsible for lighting,diseases were caused by curses not germs.
Darwin ;
Quote :
Yet reason tells me, that if numerous gradations from a perfect andcomplex eye to one very imperfect and simple, each grade being usefulto its possessor, can be shown to exist; if further, the eye does varyever so slightly, and the variations be inherited, which is certainlythe case; and if any variation or modification in the organ be everuseful to an animal under changing conditions of life, then the difficulty of believing that a perfect and complex eye could be formed by natural selection, though insuperable by our imagination, can hardly be considered real. How a nerve comes to be sensitive to light, hardly concerns us more than how life itself first originated; but I may remark that several facts make me suspect that any sensitive nerve may be rendered sensitive to light, and likewise to those coarser vibrations of the air which produce sound. (Darwin 1872, 143-144)
Darwin continues with three more pages describing a sequence of plausible intermediate stages between eyelessness and human eyes, giving examples from existing organisms to show that the intermediates are viable.
For example, birds of prey have much greater visual acuity than humans, and some can see ultraviolet light.
Color Vision:
Human eyes respond to light with wavelength in the range of approximately 400 to 700 nm. Other animals have other ranges, with many such as birds including a significant ultraviolet (shorter than 400 nm) response.
Mantis shrimp totally pwns any other animal,since their eyes have more than ten different classes of visual pigments.Also the superposition compound eyes of Mantis shrimps give enable it to enjoy from one of the highest resolution eyes.
Mechanism :
Well mechanism of mammals eyes is where we can clearly see the poor design ;The structure of humans' (as well as all mammals') eyes. The retina is 'inside out'. The nerves and blood vessels lie on the surface of the retina instead of behind it as is the case in many invertebrate species. This arrangement forces a number of complex adaptations and gives mammals a blind spot. (SeeEvolution of the eye). Six muscles move the eye when three would suffice.
Perception : individual eye of the mantis shrimp has depth perception and trinocular vision. In contrast, we humans require both of our eyes for depth perception and binocular vision.
Home 
