Without the eyeball, the optic nerve, and the visual cortex, a randomly mutated incomplete eye would actually be counterproductive to the survival of a species and would therefore be eliminated through the process of natural selection.
Bila mbooni mizipa ya macho na sehemu ya picha zikihamishwa kwa ghafula, jicho lizilo kamilika litakuwa halitumiki vilivyo kwa mudhumini ya kuishi kwa kiungo na kwa hivyo litangólewa kupitia kwa mfumo wa kuchaguliwa kawaida.