I have hyperoptia with roughly +5 diopters on both eyes and considering occasionally using diving mask for snorkeling in summer. The problem is, these masks usually come only up to +3.5 diopters and prescription mask is too high investment for few days a year.
I'd like to ask, if using +3.5 diopter in my case would improve situation from just using normal mask – I can see well enough without glasses for limited time, but it is not comfortable for my eyes.