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Base curve radius

Base curve radius (BCR) or simply base curve (BC) is the measure of an important parameter of a lens in optometry. On a spectacle lens, it is the flatter curvature of the front surface. On a contact lens it is the curvature of the back surface and is sometimes referred to as the back central optic radius (BCOR). Typical values for a contact lens are from…

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Base curve radius

Nodes8
Edges7
Triples0
Avg. degree1.75
Density0.25
Components1

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Important terminology

lens contact radius base curve curvature cornea important flatter surface back number optometry comfort tear bcr simply bc measure parameter

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