Introduced in 2001, this lens was in response to the desire for a flatter glass material lens. Using a specific curve structure that provides a clearer image than the truly flat lens design, this glass lens performs extremely well in most conditions. The specific curve structure combined with the clear optical properties of glass minimizes traditional reflections that often plague flatter designs while allowing a sharp clean view of the target. The premium AR Coating is provided by Zeiss®. Offered lens powers are: +.25, +.37, +.50, +.62, +.75, +.82, and +1.00 diopter. Lens drilling is not available.