I am legally blind and have not gone the prescription mask route, yet. You can not wear glasses under a mask, they would not seal. I have been satisfied so far doing an occasional dive, but have considered the RX mask if I were to take up SCUBA.
All I ask is a tall ship and a star to steer her by; John Masefield
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014, Regal 2014
Star Clippers: Royal Clipper 2015