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Three month study of changes in the cornea after computer‐determined and conventionally‐determined contact lens fitting
Author(s) -
Lam Andrew K. C.,
Douthwaite W. A.
Publication year - 1994
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1994.tb00557.x
Subject(s) - cornea , contact lens , lens (geology) , optometry , optics , ophthalmology , materials science , medicine , physics
The conventional rigid‐lens fitting method uses fluorescein to assess the tear layer beneath a trial lens on the corneal surface. A more advanced technique, which uses a computer program to determine the back surface specifications of a contact lens from a pre‐set tear layer thickness, has been studied. No significant difference was found in terms of corneal physiological changes between the conventionally determined contact lenses and computer‐determined contact lenses after a three‐month wearing period. The results suggest that there is little difference in the two methods of fitting. However, the computer determined method was found to be more efficient in terms of chair time, and also can aid inexperienced rigid lens practitioners to select the appropriate lens back surface curves.