| Its name is anableps, but in all probability it does not wish the fact to be generally known. |
| Anableps tetrophthalmus, the four-eyed fish, inhabits the rivers of Mexico and northern South America. |
| Any other fish or mammal would have been just as likely as anableps to begin the development of a bifocal eye. |
| In two genera of fishes, anableps, Dialommus, the cornea is divided by a horizontal partition into two parts. |
