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.
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Alaska 2014 - haven't picked a cruise yet
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, Caribbean 2013