Unlike in fish and frogs, the human retina doesn't regenerate, and the vision loss caused by damage to cells in the back of the eye – be it genetic or physical – can rarely be fixed.

Can retina repair itself?

A detached retina won't heal on its own. It's important to get medical care as soon as possible so you have the best odds of keeping your vision.

How do eye cells regenerate?

The neural progenitor cell proliferates to form a cluster of neural progenitors, which migrate to the outer nuclear layer of the retina and differentiate into photoreceptors to replace the lost cells. This process restores retinal function to the injured fish.