Inventors:
Fred Schpak - Evanston IL
Ian D. Malkes - Morton Grove IL
Assignee:
Laco Laboratories, Inc. - Skokie IL
International Classification:
G01N 2101
Abstract:
A device for supporting a contact lens in any desired position with relation to an optical instrument to enable the parameters of the lens, especially the curvature and/or the axes of the surfaces of the lens, to be analyzed. The device comprises a base member which is provided with means for attaching it to an optical instrument such as a keratometer or radiuscope. The base member has an extension which carries a receptacle or container for a solid, resilient, elastomeric, lens-engaging material to which the concave and convex surfaces of a contact lens are removably adherable by slight pressure. The material is dry to the touch, non-blocking (i. e. , no adhesion between the lens and the lens engaging material) and non-smearing with respect to the surface of a contact lens, and has a refractive index such that it eliminates reflection from the surface of the lens in contact with the material. A lens, when adhered to the material, can be oriented in any desired plane with respect to an optical instrument. A cover desirably is provided for the receptacle or container to shield the lens-engaging elastomeric material from contaminants, and an alignment card is provided to facilitate initial adjustment of an optical instrument with relation to the vertical axis of a lens.