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March 1981

Optical Advantage of a Soft Contact Lens in Specular Microscopy

Arch Ophthalmol. 1981;99(3):511-512. doi:10.1001/archopht.1981.03930010513028

To the Editor.  —In an article in the Archives (1980;98:188), Polse et al advocated the wearing of a soft contact lens by subjects undergoing examination of the corneal endothelium by contact specular microscopy for a variety of reasons. We would like to draw attention to a further optical advantage that can be gained by the selection of a soft contact lens with appropriate properties.A large field of view of the corneal endothelium image, without loss of magnification, is desirable in clinical specular microscopy.1 Most of the clinical specular microscopes available provide only a small visible field, owing to the use of narrow slit illumination necessitated by the combined effects of the thinness of the cornea, the acute angle of illumination, and the different intensities of the reflections from the interfaces between the endothelium-aqueous humor and the epithelium (tears or saline)-glass of the objective cone of the microscope.An

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