Blind Golf Rules
Blind Golf is played strictly to the Rules of Golf produced by the Royal and Ancient Golf Club of St Andrews (R&A) and United States Golf Association (USGA). They have published "A Modification of the Rules of Golf for Golfers with Disabilities".
This allows blind golfers to ground their club in a hazard and their coach/guide to stand on the line of the shot without penalty while the shot is played.
Each player has a sighted coach/guide who describes the hole, helps with club selection and then ensures that the club head is directly behind the ball. From then on it's down to the blind golfers' swing.
Under the Rules of Golf, a coach would have the same status as a caddie. That said, if the coach cannot perform the duties of a caddie, it is permissible for a blind golfer to have both a coach and a caddie.
There are three categories of blind golfer determined by the individual's level of sight - B1, B2, B3. You can download a sight classification form from this site.
Blind and Visually Impaired Golfers play with the aid of a caddy or guide (helper) and with the assistance of spotters in some competitions.