Another option is to alter your mask & with this option there are two kinds you can make:
1. With our leather masks you can cut the eye holes to fit your glasses, sounds silly but it is quite easy to do...Just cut the eye holes a bit bigger.
2. With almost any eye mask you can attach pieces of foam to its inside so it sits away from your face leaving room for your glasses.
You can do this by aligning your mask with your glasses (on a table or other hard surface is best) & cutting a piece of foam into four strips of equal length, then arranging the foam on the back of the mask around the edges of the glasses (on your temples and cheekbones so to push the mask out more)
Once you get the foam in a comfortable position, you can attach the foam to the mask using a good strong glue (Bostik is good for this) or double-sided tape.
Check out the template below for a good example....