It goes without saying but I'll say it anyway. Always wear appropriate eye protection for all racquet sports. Dress regualr glasses are not adequate and need to be sports glasses with strong frames and safe hinges and impact resistant lens.
JCH III MD
Thank you so much Doctor. I appreciate your professional advice.
First I would suggest you ask the question of your present ophthalmologist. If you were my patient I would allow you to play tennis. Remember that retinal surgeons generally do not put physical limitations on sports like tennis and running after retinal detachment surgery. There are published papers on that.
The eye images you see with rapid eyemovement in a darked adapted state are normal and come from the eye muscles tugging on the retina and are a type of entopic phenomena.
There is also no increased rate of retinal detachment in tennis players, runners, only in boxers and in people hit in the eye (fist, feet, racquets, balls, etc).
JCH III MD