The location of the center of the eye as it rotates is important in lens design calculations to maximize the fields of clear vision. Standard progressive lenses often assume that every eyeball has the same length. But the actual location of the center of rotation can differ significantly from person to person, which means that many eyeglass wearers will not enjoy the best possible lens design performance.
ZEISS Progressive Individual® 2 (Patent) utilizes proprietary Center of Rotation Evaluation (C.O.R.E.) technology to provide a more accurate calculation of the lens design. Based on extensive vision research and anatomical measurements of actual eyeglass wearers, the C.O.R.E. algorithm estimates the center of rotation to within 1mm for 99% of wearers. The result is superior visual clarity over more of the lens — without any requirement for additional measurements.
C.O.R.E. technology is now built into all ZEISS customized lenses.
Achieving superior wearer satisfaction requires meeting the interrelated demands of ergonomic comfort and visual clarity. The GT2® family of progressive lenses is the culmination of the ZEISS Optical Optimization & Management approach that synthesizes ZEISS’ cutting-edge expertise in these two key areas: