Essilor X 4D varifocals
Well, in answer to my promise (in post 318) to report back about the Essilor X 4D varifocals I have to say I was very dissapointed with them. Although periferal vision was better than my previous attempt at varifocals (Essilor Comfort lenses) the non distorted field of view was limited to a very narrow vertical strip in the centre of the lens, outside of which straight lines were curved. I found that unacceptable when viewing the EFIS screens, so I have reverted to Executive style bifocals with the top section suitable for distant vision and the lower section prescribed to focus adequately at distances between 36cms and 96cms. Ideal for the aircraft type I operate and no distortion.