Never knew how much I needed this!!
Bought these when we were going to a destination wedding as I wear trifocals. The staff was very knowledgeable and helped me pick out what I would need, but did not more than I needed. I was ready to buy a more expensive one that would accommodate my trifocal prescription, but after the staff asking me what I would be using the mask for, they determined I would only need to have the middle prescription. The mask is fantastic! At home I use it in our pool. The pool had a leak in it and I would not have been able to find it without wearing the mask. A purchase that has been well-worth it!!