How to heal vision issues after being slapped on the face?

Hello doctor,

I recently got slap in my face (2 days ago), and I got some vision problems. It has been two days, and the problems have not been reduced or changed yet. There is a completely opaque black big oval which is blocking my left eye vision near the nose. Both the eyes have a little bit of blur entirely. Both the eyes have floaters and light flashes. In dim light or during the night, I can clearly see that black oval-shaped blockage near my nose. When we went to an ophthalmologist, he said there is no problem with the retina as of now. To me, it seems like retinal detachment. Is this really retinal detachment, and was I misdiagnosed? Can the problem get worse if I waited for a longer time? If it is not retinal detachment, is it permanent loss of peripheral vision or anything severe?

Thank you doctor,

I do not know anything about B-scan. Yes, I was dilated, I was made to lie down, and some metal device was used. After checking for 10-15 minutes (he told me to look at the thumb), the doctor said that there is no retina problem. If there is no retina problem, what could be the issue? Is there a possibility that the retina might detach later on? Is it something else more severe?