Method for measurement of the cavity volume of soft contact lens

Details Method for measurement of the cavity volume of soft contact lens Method for measurement of the cavity volume of soft contact lens

1982-03-25

1984-05-01

Swisher, S. Clement

Measuring and testing

With fluid pressure

Dimension, shape, or size

73149, G01F 1700

Patent

active

044453620

ABSTRACT:
A soft contact lens is rested freely on a planar or convex (preferably spherical) surface immersed in a liquid. The liquid enclosed between the inner surface of lens and the planar or convex surface is sucked off and the volume of sucked off liquid is measured. A vessel with immersion liquid, having a plane or convex surface of its bottom is provided with a hole, which is connected with a measuring capillary tube through a broadened inlet chamber containing a mercury drop. The measuring capillary tube is furnished with a scale corresponding to its volume and is connected, at the outlet, with a drain or pressure reservoir through a broadened outlet chamber and a unit for pressure variation. The volume sucked off is determined by the shift in the mercury drop.

REFERENCES:
patent: 3459032 (1969-08-01), Yamaguchi

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