Mae nifer y bobl y nodir bod ganddynt nam ar eu golwg wedi lleihau yng Nghymru dros y 5 mlynedd diwethaf (o fis Ebrill 2008 i fis Mawrth 2013).
The number of people certified as having a visual impairment in Wales has reduced over the last five years (from April 2008 to March 2013).