base curve(redirected from Base curve radius)
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curve, base (BC)
1. The shallower principal meridian of a toroidal surface of a toric lens. The other meridian of the toroidal surface which has the maximum power is called the cross curve.
2. In a meniscus lens, the shallower of the two surfaces.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann