Feasibility of simultaneous correction of ametropia by varying gel refractive index with phaco-ersatz

A. Ho, P. Erickson, Fabrice Manns, T. Pham, Jean-Marie A Parel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsF. Manns, P.G. Soderberg, A. Ho
Pages119-128
Number of pages10
Volume4245
DOIs
StatePublished - 2001
Externally publishedYes
EventOphthalmic Technologies XI - San Jose, CA, United States
Duration: Jan 20 2001Jan 21 2001

Other

OtherOphthalmic Technologies XI
CountryUnited States
CitySan Jose, CA
Period1/20/011/21/01

Fingerprint

accommodation
Lenses
Refractive index
Gels
gels
refractivity
Ray tracing
Polymers
myopia
lenses
Availability
Crystalline materials
polymers
capsules
tracing
ray tracing
availability

Keywords

  • Accommodation
  • Ametropia
  • Eye model
  • Phaco-ersatz
  • Presbyopia
  • Refractive index

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Ho, A., Erickson, P., Manns, F., Pham, T., & Parel, J-M. A. (2001). Feasibility of simultaneous correction of ametropia by varying gel refractive index with phaco-ersatz. In F. Manns, P. G. Soderberg, & A. Ho (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 4245, pp. 119-128) https://doi.org/10.1117/12.429263

Feasibility of simultaneous correction of ametropia by varying gel refractive index with phaco-ersatz. / Ho, A.; Erickson, P.; Manns, Fabrice; Pham, T.; Parel, Jean-Marie A.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / F. Manns; P.G. Soderberg; A. Ho. Vol. 4245 2001. p. 119-128.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ho, A, Erickson, P, Manns, F, Pham, T & Parel, J-MA 2001, Feasibility of simultaneous correction of ametropia by varying gel refractive index with phaco-ersatz. in F Manns, PG Soderberg & A Ho (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 4245, pp. 119-128, Ophthalmic Technologies XI, San Jose, CA, United States, 1/20/01. https://doi.org/10.1117/12.429263
Ho A, Erickson P, Manns F, Pham T, Parel J-MA. Feasibility of simultaneous correction of ametropia by varying gel refractive index with phaco-ersatz. In Manns F, Soderberg PG, Ho A, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 4245. 2001. p. 119-128 https://doi.org/10.1117/12.429263
Ho, A. ; Erickson, P. ; Manns, Fabrice ; Pham, T. ; Parel, Jean-Marie A. / Feasibility of simultaneous correction of ametropia by varying gel refractive index with phaco-ersatz. Proceedings of SPIE - The International Society for Optical Engineering. editor / F. Manns ; P.G. Soderberg ; A. Ho. Vol. 4245 2001. pp. 119-128
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