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Proceedings Paper

Feasibility of simultaneous correction of ametropia by varying gel refractive index with phaco-ersatz
Author(s): Arthur Ho; Paul Erickson; Fabrice Manns; Therese Pham; Jean-Marie A. Parel
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Paper Abstract

Recent developments in surgical procedures for restoring accommodation saw the availability of Phaco-ersatz as a feasible procedure returning near vision to the presbyopies. In Phaco-ersatz, the presbyopic crystalline lens is extracted and replaced by a flexible polymer gel in the intact lens capsule. The ability to simultaneously correct ametropia while restoring accommodation with this procedure is seen to be extremely attractive. One strategy by which this may be achieved within the Phaco-ersatz procedure is by making use of polymer gel of different refractive indices. We assessed the feasibility of simultaneously correcting ametropia while restoring accommodation using phaco-ersatz using this approach. Two model eyes (Gullstrand and Navarro) were used to evaluate this approach. Computation results using paraxial equations and ray tracing indicated that while this approach might be feasible for the hypermetrope, its usefulness for correcting myopia is limited due to significant reductions in the resultant amplitude of accommodation. A number of practical considerations may also influence the applicability of this approach.

Paper Details

Date Published: 7 June 2001
PDF: 10 pages
Proc. SPIE 4245, Ophthalmic Technologies XI, (7 June 2001); doi: 10.1117/12.429263
Show Author Affiliations
Arthur Ho, CRC for Eye Research and Technology/Univ. of New South Wales (Australia)
Paul Erickson, CRC for Eye Research and Technology/Univ. of New South Wales (Australia)
Fabrice Manns, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)
Therese Pham, CRC for Eye Research and Technology/Univ. of New South Wales (Australia)
Jean-Marie A. Parel, Bascom Palmer Eye Institute/Univ. of Miami School of Medicine (United States)


Published in SPIE Proceedings Vol. 4245:
Ophthalmic Technologies XI
Fabrice Manns; Per G. Soederberg; Arthur Ho, Editor(s)

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