Another brief lesson to help TF artists n writers. Even if you plan to go sideways with it and create something entirely new, its good to know how the actual parts work. The only extra note I would make is if you need a bit of perspective to help with writing a character gaining multiple eyes- put your finger slowly onto the end of your nose. Now imagine where the additional eye is and imagine doing that, except between where your existing eye is and where you are placing the new eye- now you have a reference for the limitations of their field of view, just repeat for the rest of their eyes. If they have a long face or big horns or tusks on their faces, remember you cannot see through those- they each create a bit of a blind spot. This is lessened a bit for creatures with wide heads- because if their eyes are far enough apart they can still potentially see around the obstruction.

I was going to make a Sharingan joke but decided against it, lol.