There was a story about an engineer going to the market to buy

pig eyes for lenses research. Gliding magnetic tools to work on

nerves inside the eye. Replacing lenses and lenses research.

Google ---Extreme Tech--grapheme base display..contact lenses

 

It wouldn't surprise me. Are pigs eyes closer to ours? I remember in the 7th grade we had to dissect a cow eye for biology. It was a lot better than the frog, very cool experience.