Negative Diopter

• Negative diopter covers entire surface of lens
• Easy to install on XS Scuba M-Line & MRx Mask
• Fits many of today’s most popular masks
• Highest quality optical glass 
• Precision ground and polished
• Tempered glass
• Meets ANSI Z86.11.1985 standards
• Available in -1.0 to -8.0 negative diopters

Positive Diopter

• Positive magnification covers bottom 1/3 of lens
• Top 2/3 of lens is clear glass
• Same features as negative lenses
• Available in +1.75, +2.25 & +2.75 positive diopters