The cornea does not contain any blood vessels, but instead contains many nerve endings that make it extremely sensitive. That is why a scratch or a loose eyelash is so painful.
Maybe use gloves that are easy on the finger tips or very flexible, like a strong latex, or a couple of layers of regular latex gloves. Maybe use rubber finger covers meant for string instruments, as they are rubber and will help you grip the balloon and wont pop it. Or maybe try deflating them a bit because as you twist, you're forcing more air into different parts of the balloon which causes too much pressure. It will look the same if you just deflate it a tad.
Hope this helps!
Answer:
single replacement reaction
Explanation:
the iron molecules would rather react with Bromine instead of Iodine. So, the iron molecules switch over to bromine leaving the iodine molecules by themselves.