AG Augen USA LC Lensco
AL Aire-O-Lite NK Nikon
AO American Optical PI Polycore, Inc.
AP Apexx Optical, USA PY Polylens
AR Signet Armorlite RD Rodenstock
AS Asahi RO Rochester Optical Mfg. Co.
BR Bristol C and D SA Sola Optical USA
CO Conant Optical SC Shore Lens
CT Centennial Optical Ltd SH Shamir Insight Inc.
CZ Carl Zeiss Optical, Inc. SK Seiko Optical Products
DG Dagas Optical USA, Inc. SL Specialty Lens Corp.
EO BluTech SO Somo Lens LLC
ES Essilor of America, Inc. TG Thai Optical Group
EY Eyenavision TK Tokai Optical Co.
GE Gentex TR Three Rivers Optical
HM Healthwell Medical / CU America UN Unity
HO Hoya Vision VE Vision-Ease Lens
IG Intercast Group VI Vision Dynamics
IN Indo Industrias VS VSP
IO Indizen Optical Technologies VW Vision Warehouse
KB KBco VX Varilux Lenses
KN Kaenon, LLC XL X-Cel Optical Co.
YG Younger Optics