The Optical Shop and Counter |
Other editions - View all
The Optical Shop and Counter Alf Henry Johnsen,Bertram A. Weeks,Frederick H. Weller No preview available - 2012 |
The Optical Shop and Counter Alf Henry Johnsen,Bertram A. Weeks,Frederick H. Weller No preview available - 2012 |
Common terms and phrases
abrasive adjustment align angle of incidence base curve bend bevel bifocal block calipering carborundum center of lens center of segment crown glass curvature cutting cylinder cylindrical element diamond diopter distance between lenses distance portion drilling edge of lens endpiece eyewire face finger finger-piece flat focal focus frame geometrical center grinding slip guards half round plier height holder hole horizontal line inch insert kryptok leaf shape left hand length lens blank lens measure light machine marked meridian meter method millimeters minus mounting neutralize operation ophthalmic optical center optical cross optical density pad bridge pantoscopic patient pattern pitch plane plano position of crest prescription prism protractor refracting power refracting surface retroscopic right angles rimless rough blank saddle bridge screw semi-finished shape side snipe nose plier sphere spherical Step number stone straight strap surface of lens temple thickness thumb trial lens usually vertical wave zylonite