Cressi Quantum Negative Prescription Dive Masks The major innovation with the Cressi Quantum Dive Mask is that as well as offering enhanced vision downwards, it avoids the fogging phenomenon through the internal thermoregulation of the warm, damp air exiting the nose. This air is channelled by a system of membranes set in the moulding around the eyes and nose and deviating the flow towards the silicone skirt rather than the lenses. The outer part of the skirt features a cooling system composed of two small heat exchangers that act as radiators. The effect is that the temperature inside the mask drops, coming closer to the external temperature, and the droplets of humidity are trapped before the air reaches the lenses, preventing them from fogging up. Despite the small internal membranes deviating the airflow and the external heat exchangers, the body of the Quantum mask is compact and represents the most advanced design offered on the underwater vision market. Cressi Quantum Dive Mask Features: PATENTED ANTI-FOG SYSTEM DOUBLE INJECTION TECHNOLOGY INCLINED LENSES FLEXIBLE BUCKLE WITH MICROMETRIC ADJUSTMENT BI-SILICONE STRAP TEMPERED GLASS Big Eyes Evolution Corrective lenses: The Cressi Big Eyes Evo – Quantum Mask Negative Optical Lens are designed for use with the Cressi Big Eyes Evolution and Cressi Big Eyes Evolution Crystal Masks and the new Cressi Quantum Masks. The lenses are available in negative half dioptre increments from -1.0 to -6.0. The lenses are NOT interchangeable (they fit in only the left or right frame). If you have a different prescription for each eye, it is necessary to specify which value is for the right or left eye. These prescription lenses are pre-made corrective lenses made from high-quality optical glass. Please note that the Positive Diopters are only the Sphere part of your script. If you are not sure what lenses to order, please ask your optometrist for advice before purchasing for each eye. Prescription Lens Features: Cressi Corrective Lens for Cressi Big Eyes Evolution Mask Easy to Install Range: -1.0 to -6.0-Diopter Increments: 0.5 Right and Left Side Lenses are NOT Interchangeable Increase Your Vision Please note the optical correction lens price is per lens. Also available as a Positive (gauge reader) lens.
