THE INVERTED RETINA
The human eye contains a RETINA –a
membrane with approximately 120 million cells called PHOTORECEPTORS, which
absorb light rays and convert them into electric signals. Your brain interprets
these signals as visual images. Evolutionists have contended that where the
retina is placed in the eyes of vertebrates, creatures with a backbone, proves
that the eye had no designer.
The retina of VERTEBRATES is inverted,
placing the photoreceptors at the back of the retina. To reach them, light must
pass through several layers of cells. According to evolutionary biologist
Kenneth Miller, this arrangement SCATTERS the light, making our vision less
detailed than it might be.
Evolutionists thus claim that the
inverted retina is evidence of poor design –really, no design. One scientist
even described it as a functionally stupid upside-down orientation. However,
further research reveals that the photoreceptors of the inverted retina are
ideally placed next to the pigment epithelium –a cell layer that provides
oxygen and nutrients vital to keen sight. If the pigment epithelium tissue were
placed IN FRONT of the retina, sight would be seriously compromised.
The inverted retina is especially
advantageous for vertebrates with small eyes. Between the lens of the eye and
the photoreceptors, there must be a certain distance to get a sharp image.
Having this space filled with nerve cells means an important saving of space
for vertebrates.
Additionally, with the nerve cells of the
retina tightly packed and close to the photoreceptors, analysis of visual
information is fast and reliable.
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