Flickering vision. Is required?.

I was diagnosed with retinal swelling. my doc said it can be managed and gave me theragran h multi vitamin and tears naturale eyedrops also he said its due to excessive screen time. I took these meds for some time than stopped cuz i was not satisfied. My right eye is fine but vision in my left eye is affected i cant see the details and when i look at the moon or other ligh sources there appears to be some sort color around it.There r no dark spots, no flashes of light, no floaters i dont have an any health condition. BUT one thing that is bothering me is very weak flickering in my vision . please note that its flickreing not flashing. Specially in low light conditions or in complete dark when i move my eyes i note some flickering. These r not very intense but noticable. Iam very much worries if it is dangerous? Is it worrisome? Iam scared of surgeries or anything like that what could it be and what treatment is required?. Please help as much as possible i'd be much obliged. Thank you!