Please welcome Eyoyo Underwater Fishing Cameras.https://amzn.to/3siEgXn
What is the best way to preserve a few to try? I'm sure freezing is probably the way but simply as they are or submerged in water, or do they need to be frozen is some sort of weak preservative solution, like a low salt mix? I do keep some perch now and again and could put a few eyes away to try, once dead of course. I did find a few mentions of other fish eyes, like bluegill and crappie, seems some have had no luck, some have had a bit of luck but perch eyes get the most attention.
I put mine I a pill bottle with a little bit of vegetable oil and put I the bait fridge
That works , it’s not like you need very many to get started
Pill bottle is a great idea; I wonder how long they'll last in the oil bath and 'fridge? I have a pond nearby that I should be able to get some late season open water perch and bluegill from pretty easily if "eyes in oil" have a short shelf life in the fridge.
http://Olive oil is a natural preservative that prevents spoilage by isolating the food from air, providing a seal that can delay oxidation, deterioration and molding.Sep 1, 2010