Abstract: An apparatus for positioning a toric soft contact lens in relation to an optical measuring instrument includes discs for supporting the contact lens and a handle for rotatably holding the discs. Separate discs are provided for front vertex power measurements and for back vertex power measurements. Spacers are provided for advantageously positioning the discs on the lens rest of the measuring instrument. Methods are described for verifying lens markings with the device. The device can also be used as an aid in lens inspection.

Abstract: An apparatus for analyzing a soft contact lens by allowing inspection of the lens and measurement of its diameter, sagittal depth, and center thickness includes a lens holder comprising a handle and a lens chamber. The chamber has horizontally adjustable walls, a transparent movable lid, and a floor with a centrally located opening smaller than the diameter of a lens. The lens diameter can be read from a scale on the floor of the chamber and the walls of the chamber can then be spaced according to the measured diameter to center the lens over the opening. A probe remotely operable from outside the chamber is inserted through the opening in the chamber floor and moved vertically until its tip contacts the concave side of the lens. The sagittal depth of the lens is read from a scale associated with the probe.