Optical Heritage Museum Web Site
Ophthalmic Industry Resources Page
Darryl Meister's Outstanding
Lens Optical Analysis Program
Free download link: http://www.opticampus.com/files/spectacle_optics.zip
On-line calculators:
http://www.opticampus.com/tools/calculators.php
Ophthalmic forum:
http://www.optiboard.com/forums/
OHM Ophthalmic Links of Interest
Ophthalmic Antiques International Collectors Club