Understanding Lens Surfacing

Review of optics; the lens blank; layout for single vision lens surfacing; layout and marking of flat top and curved top lenses; layout and marking of round seg and blended bifocal lenses; layout and marking of Franklin style lenses; basic concepts in finding tool curves lens thickness; additional factors influencing tool curves and lens thickness; blocking and cribbing; generating; lap tools; fining and polishing; deblocking, verifying and hard coating; high powered lenses; progressive add lenses; creating horizontal prism with the near add; vertical imbalance corrections; alternatives to lens surfacing; safety eyewear standards.