Computed estimation of visual acuity after laser refractive keratectomy

Pascal Rol, Jean-Marie A Parel, Khalil Hanna

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

1 Citation (Scopus)

Abstract

A number of surgical techniques has been developed to correct ametropia (refractive defaults) of the eye by changing the anterior corneal radius. Because the air-cornea interface makes up for about two-third of the refractive power of the eye, a refractive correction is obtained by a suitable photoablation of the cornea. For this purpose, an ArF excimer laser which emits a wavelength of 193 nm is being used. After a mechanical removal of the epithelium, the Bowman's layer and the corneal stroma are photoablated on typically 50% of the central surface of the cornea with various precomputed shapes. After regrowth of the epithelium, a smooth interface with air develops itself, which can be attributed to a mechanical equilibration. Yet, SEM studies have shown that irregularities can remain in the new stromal surface. This study is an attempt to quantify the vision blur as a function of the deformation observed at the epithelium-stroma interface.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsCarmen A. Puliafito
PublisherPubl by Int Soc for Optical Engineering
Pages89-93
Number of pages5
Volume1423
StatePublished - 1991
Externally publishedYes
EventProceedings of Ophthalmic Technologies - Los Angeles, CA, USA
Duration: Jan 21 1991Jan 22 1991

Other

OtherProceedings of Ophthalmic Technologies
CityLos Angeles, CA, USA
Period1/21/911/22/91

Fingerprint

visual acuity
cornea
epithelium
Lasers
Excimer lasers
Air
lasers
air
irregularities
Wavelength
excimer lasers
Scanning electron microscopy
scanning electron microscopy
radii
wavelengths

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Rol, P., Parel, J-M. A., & Hanna, K. (1991). Computed estimation of visual acuity after laser refractive keratectomy. In C. A. Puliafito (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 1423, pp. 89-93). Publ by Int Soc for Optical Engineering.

Computed estimation of visual acuity after laser refractive keratectomy. / Rol, Pascal; Parel, Jean-Marie A; Hanna, Khalil.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / Carmen A. Puliafito. Vol. 1423 Publ by Int Soc for Optical Engineering, 1991. p. 89-93.

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

Rol, P, Parel, J-MA & Hanna, K 1991, Computed estimation of visual acuity after laser refractive keratectomy. in CA Puliafito (ed.), Proceedings of SPIE - The International Society for Optical Engineering. vol. 1423, Publ by Int Soc for Optical Engineering, pp. 89-93, Proceedings of Ophthalmic Technologies, Los Angeles, CA, USA, 1/21/91.
Rol P, Parel J-MA, Hanna K. Computed estimation of visual acuity after laser refractive keratectomy. In Puliafito CA, editor, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 1423. Publ by Int Soc for Optical Engineering. 1991. p. 89-93
Rol, Pascal ; Parel, Jean-Marie A ; Hanna, Khalil. / Computed estimation of visual acuity after laser refractive keratectomy. Proceedings of SPIE - The International Society for Optical Engineering. editor / Carmen A. Puliafito. Vol. 1423 Publ by Int Soc for Optical Engineering, 1991. pp. 89-93
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