Abstract
The satisfaction expressed with bifocal glasses by hyperopes, whose presbyopia necessitated stronger convex lenses for reading, led me about a year and a half ago to advise this form of spectacles for aphakic patients. The conclusion reached seemed so natural to my mind that I believed, until I examined the literature of the subject, that the same idea must have occurred to many of my colleagues, and that such glasses must have been used for cataract patients, practically since the introduction of the cement bifocal. Due and strict search having been made nothing was found in the literature, and but little new was gathered from the manufacturing opticians concerning the trial of such glasses by other ophthalmists. The most appropriate form seems to be that in which the refractive value is made greater by cementing a semilunar shell to the lower part of the larger lens. On account of the
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