When first diagnosed 19 yrs ago I had an LP shunt, my eyesight at that time was bad - total blindness at times, loss of peripheral vision and massive blind spots, that all went once I had the shunt although my general sight deterioration, i.e. glasses prescription didn't regain much but then I had been very high pressure with 2/3 weekly LP's for about 4mths.
Last op, VP shunt, I had been shuntless for 6 wks and in that time was already losing sight totally at times, post VP shunt that went.
So in answer to your question, I think we are all different but in general the main sight deficiencies do recover.
Good luck with the op.