Posterior aspheric surface with aberration-neutral technology
Optic Edge Design
Amon-Apple 360° enhanced square edge
Closed loop with Anti-Vaulting Haptic (AVH) technology
Estimated Constants for Optical Biometry
Barrett Universal II
For Contact Ultrasound, the estimated A-constant is 118.0
Please note that the constants indicated for all Rayner lenses are estimates and are for guidance purposes only. Surgeons must always expect to personalise their own constants based on initial patient outcomes, with further personalisation as the number of eyes increases.