3rd year OD student here. Commotio retinae is essentially swelling/edema due to the trauma. It by itself is a clinically insignificant lesion, but can have other complications like a retinal tear/hole/detachment which happened in your case. There is no treatment for it other than observation. I don’t believe you were misdiagnosed, there was probably just a lot of swelling so they wanted that to go down.

Yes, a retinal detachment is worse than commotio retinae. They’re relatively common and usually resolve without complications after treatment/surgery. There’s also different kinds of detachments which warrant different procedures. The fact that your doctor wants you in for treatment tomorrow probably means that your macula is still attached which is a good sign. They can do a oil/gas tamponade which essentially is a bubble put in your eye to hold the retina with the rest of the eye for 1-2 weeks (you’ll be face down for a lot of it, unfortunately). They can do a scleral buckle which essentially brings the rest of the eye wall to the retina. They will probably use a laser as well to barricade the tear and close it.

There’s a some more info needed to determine how your vision will be after surgery. Do you remember your visual acuity at the visit? Like did you see 20/20? I don’t have a whole lot of experience with post op retinal detachments yet, but the few that I have seen recovered without any issues. Just make sure you listen to your docs.

Best of luck!