Indeependent
Diamond Member
- Nov 19, 2013
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The issue is that a fetus can hear and see in the womb; there is no reversal of function from conception to death.The Not-So-Intelligent-Design of the Human EyeNot true; the human eye makes perfect sense from conception through death.Neither does the human eye, yet both seem to work somehow. No intelligent designer would create either one.The birth process, as any obstetrician will tell you, makes no sense.Not to worry, I wouldn't work for someone so clueless. Obviously the birth process works, just because you can't understand how it could develop naturally doesn't mean nobody can.Are you this delusional at work?
I would fire you on the spot.
The most obvious design flaw of the retina is that the cellular layers are backwards. Light has to travel through multiple layers in order to get to the rods and cones that act as the photo-receptors. There is no functional reason for this arrangement – it is purely quirky and contingent.
Even in a healthy and normally functioning eye this arrangement causes problems. Because the nerve fibers coming from the rods and cones need to come together as the optic nerve, which then has to travel back to the brain, there needs to be a hole in the retina through which the optic nerve can travel. This hole creates a blind spot in each eye. Our brains compensate for this blind spot so that we normally don’t perceive it – but it’s there.
The human eye is a well-tread example of how evolution can produce a clunky design even when the result is a well-performing anatomical product. The human eye is indeed a marvel, but if it were to be designed from scratch, it’s hard to imagine it would look anything like it does. Inside the human eye is the long legacy of how light-sensing slowly and incrementally developed in the animal lineage.