Contact lenses — practical reality
Soft contacts are the most common choice. Bring **daily disposables** if you can — saltwater can contaminate reusables. The one situation that requires care: mask-clearing drills (deliberately flooding the mask to practice clearing it). Close your eyes when water enters, blow air out through your nose to clear, then re-open. A lost lens during a dive is rare but recoverable — most divers carry one spare in their dry bag. Hard contacts are not recommended; pressure can cause discomfort.
Prescription masks — the cleaner long-term solution
For prescriptions stronger than ~-2.5 or for divers who don't want to think about lenses, a prescription mask is worth it. Bonded lenses can be ordered for any common diopter (-1.0 to -10.0 typically); we keep -1.5, -2.0, -3.0, -4.0, -5.0 on hand for spot-fitting. Custom prescription bonds take 2-3 days. Bifocal inserts for reading-only correction stick to the bottom of any mask and let you read your computer without affecting distance vision. Plan ahead by 1 week if your prescription is unusual.