The newer method of fitting contact glasses by a mold has superseded the previous trial and error method. The stock lenses will fit in about 25 per cent of cases. There are so many variations in the shape and size of the sclera and cornea that it is impossible for all eyes to fall into certain classifications of sizes. Perhaps in the future a testing set containing many sizes and shapes will suffice, but at present the impression and mold method is preferable.
The more impressions I make of eyes for contact glasses, the more I am convinced that a glass made from a mold of an eye is superior to a stock lens ; also, that in order to have a good molded glass, it is necessary to have as good an impression as it is possible to make. The better the impression, the better the glass will fit. If
ARNO E. TOWN. IMPRESSION TECHNIC FOR CONTACT GLASSES. Arch Ophthalmol. 1940;23(4):822–824. doi:10.1001/archopht.1940.00860130916007
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