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50 - 23 - 140 (mm).
Lens 'Base Curve' is a measure of the front curvature of the lens. The higher the number, the greater the curve.
OTIS offers a lifetime warranty against all defects in materials and workmanship.
Unfortunately, this doesn’t include sitting on a pair and snapping the arms off or scratched or broken lenses (even though they are epic and scratch resistant).