When it comes to sex toys, it all depends on your kinks and preferences.
You can try an electronic masturbator, or perhaps you can simply tape a fleshlight to a table and thrust into it. A massage gun can be fun, too! A shower with a strong concentrated stream of water can emulate that vibration as well, and simplifies cleanup. Maybe experiment with a dildo or butt plug; gay men have been on it for literal millennia, and I can say from experience that it feels amazing (with some practice). Perhaps you can get on “dating” apps and get someone to come give you a handjob, if that suits your fancy.
You can also just try changing the way you touch yourself. A different grip, or even a different hand, perhaps? Or try rubbing the head of your penis with your palm in a circular motion for something intense (lube recommended). Are your nipples sensitive? They can be erogenous zones for some men, so it might be worthwhile to try playing with them.
Lots of ways to achieve an orgasm without putting the same strain on your hands, but like what others have said, unless you’re a professional that wanks 8 hours a day, it’s probably not the masturbating that’s causing the pain.
the 24 fps thing is one hella myth. our cones and rods send a continuous stream of information, which is blended with past-received information in our perception to remove stuff like the movement from darting your eyes around.