Test One area of Opticianry that seems to have more Opticians baffled is prism. I hope in this short tutorial it will ease the misunderstanding... ∞
Test test The purpose of this article is to help those to understand how lenses work through the understanding of ray tracing. For the purpose... ∞
Test The approximate power on the vertical meridian for the Rx +3.00 -1.50 x 102 is?
Vertical meridian is the power in the 90th meridian.... ∞