I wouldn't think it would be allowed and whilst I sympathise, I think I'd be upset if my opponent did this and would refuse to play.
I've had the opportunity to play a blind player once and he was allowed his own special wee set. I suppose he could work stuff ahead on that but then I've tried blindfold chess and its pretty hard.
If in doubt ask the arbiter of the competition first.
I was wondering about a particular rule in chess, "Players may not use any notes" I realize the obvious, you cannot bring prepared notes into the game. Can someone bring a piece of paper, other than the score sheet, and use it to make notes or scribble possible lines of play??
The reason I ask is due to my medical condition, my thought processes are not very good. While I will accept, and anticipate, a negative response, i just want to make sure, before commiting an error in rated otb play.