Well, bleeds do encourage further bleeding.
The way my optician explained it to me when I had my major bleed is that when the eye has a lot of blood in it, it thinks to itself “Hmm, best grow some new vessels to reabsorbs that blood…”. The new vessels are themselves leaky. So more bleeding, more new vessels and you have a vicious circle going.
I credit my optician with saving my sight. Because of that explanation I I did all I could to stop further bleeding, Just common sense. If I looked up it leaked, so I learnt to move my whole head rather than moving my eyes. If I jumped out of bed in the morning, I’d get more bleeding, but if I got out slowly and then no leakage. I was aiming to minimise the amount of blood leaking into my eye, not just so I could see better, but so that vicious circle didn’t start.
Since the major bleed 9 years ago I have had two tiny bleed and one episode of leakage so small I can tell it’s there but it’s not visible to the Doctors. Overall I am pleased I didn’t rush into the vitrectomy.
It sounds like your partner hasn’t got much bleeding into his eye. If I were in his position I’d probably avoid anything that I spotted was causing new bleeding just to encourage healing in the eye.
Good luck