Couldn't dive without my bifocals.....In scuba dollars they are fairly inexpensive.
Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.
Benefits of registering include
I've always just used the "blanks" from the shop. I'm now up to +6.0 in each lens.
My "normal" glasses are corrected for astigmatism and are progressives, but the blanks work well enough underwater.
My latest acquisition is a Cressi "Big Eyes Evolution". Very happy with it and the optics are very nice.
I'm sure that you mean -6.0 in each lens. Unless you have insanely bad presbyopia. (The plus/minus system can be confusing but I do know that Cressi does not make a plus six lens).