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.