Cressi Adult Dive Mask with Inclined Lens for Scuba Diving - Optical Lenses Available | Big Eyes: Made in Italy The Big Eyes mask is one of the adult versatile masks suitable for scuba diving and snorkeling. Features inclined and inverted tear-drop lenses for improving downward visibility, a Cressi's patented design (US 6272693). The field of view is particularly wide, laterally and in the lower zone. The lenses are made of tempered glass. The dive shop can install optical lenses for those with vision problems (myopia) Low internal volume allows for effortless clearing. High-grade silicone resists aging and skirt discoloration and a leak-free seal. The mask is designed and made in Italy by Cressi, brand pioneer in Scuba Diving, Snorkeling and Swimming equipment.