Good Teaching More Important To Learning Mathematics Than Vision

I've just read an interesting article by T. V. Raman. Raman is a blind computer scientist who works for Google; however, he started out as a mathematician.

The article is Thinking Of Mathematics—An Essay On Eyes-free Computing.

I especially liked this quote.

"But to do higher-level mathematics, one first needs to do elementary mathematics, and I believe that it is even more important to find the right kind of help when one is beginning to learn. ...The challenge of gaining access to higher-level mathematics might appear to be the more complex ... [as compared with finding a good teacher]; however I believe that proper access at the introductory level is far more critical, since good access at this stage ensures that a student with the necessary mathematical aptitude remains within the field to go on and solve the challenges that lie beyond. "