I've been given very little information on this.
Standard hospital leaflet, advising 5-10 days off work and 'strenuous' activity. Ha! First few days I could barely manage to walk quickly. One week on I can (just) manage to ride the 2.5 miles to the closest rail station.
Avoiding screen use (well, I'm working but keeping days short) helps.
Optometrist booked (my glasses are wrecked), but says it might be weeks before my eyesight settles.
I'm still getting dizzy spells.
Looked up concussion classifications. I had a 3/4. Might have been a '4', if I was unconscious. Dunno, still have a completely blank 4 hour period. Initial memory loss went back to early 2016.