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(Investigative Ophthalmology and Visual Science. 1971;10:745-749.)
© 1971 by The Association for Research in Vision and Ophthalmology, Inc.

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Ultrasonographic Assessment of the Implant Lens Required to Produce Emmetropia After Implantation

GEORGE A. LEARY 1

1 Primate Research Center, Washington State University, Pullman, Wash. 99163

Present-day implant lenses are esssentially thick lens systems. The usual methods by which the required power is assessed involve treating them as thin lens systems, thus giving rise to error. It is possible to avoid such an error by changing the approach to the problem. No attempt need be made to calculate the equivalent power of the implant lens required to produce emmetropia after implantation. The alternative, presented in this report, is to ascribe arbitrarily chosen parameters to the implant lens, thus reducing the calculation to the assessment of the back surface power required to focus light onto the retina.

Key Words: implant lenses • lens power • lens constants • surface computation • ultrasonography

Submitted on June 10, 1971
Accepted on August 27, 1971






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