back optic zone radius


Also found in: Acronyms.

optic zone radius, back (BOZR) 

Radius of curvature of the back optic zone of a contact lens. (It was formerly called the back central optic radius (BCOR or BC) or posterior central curve radius (PCCR).) If the optic zone is surrounded by a peripheral zone there will be a radius of curvature of a back peripheral zone (BPR). If there are several zones there will be BPR1, BPR2, etc., beginning with the zone immediately surrounding the central optic zone. See Drysdale's method; radiuscope; Toposcope.
References in periodicals archive ?
Based on the readings shown in Image E, what would be the most appropriate back optic zone radius (BOZR) of an RGP contact lens to select initially for this eye?
a) Back optic zone radius (BOZR) and lens thickness b) Back optic zone radius (BOZR) and back optic zone diameter (BOZD) c) Back optic zone radius (BOZR) and back vertex power (BVP) d) Back optic zone diameter (BOZD) and lens thickness
a) Centre thickness of an RGP contact lens b) Peripheral thickness of an RGP contact lens c) Back optic zone radius of an RGP contact lens d) Back optic zone diameter of an RGP contact lens