Here's a dude from 3 years ago adding a flashlight: https://www.reddit.com/r/interestingasfuck/comments/yblzi4/g...
And I'm pretty sure I saw one who added a laser to theirs for raves, but can't find the link :)
You can buy very very tiny cameras today off the shelf, the main problem would be just packaging either a storage medium or wireless transfer capability + power inside the eye. With government-level budgets it's doable, possibly even by a skilled maker with resources.