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Titolo:
Effect of rotation and translation on the expected benefit of an ideal method to correct the eye's higher-order aberrations
Autore:
Guirao, A; Williams, DR; Cox, IG;
Indirizzi:
Univ Murcia, Dept Fis, Lab Opt, E-30071 Murcia, Spain Univ Murcia MurciaSpain E-30071 ept Fis, Lab Opt, E-30071 Murcia, Spain Univ Rochester, Ctr Visual Sci, Rochester, NY 14627 USA Univ Rochester Rochester NY USA 14627 Visual Sci, Rochester, NY 14627 USA Bausch & Lomb Inc, Rochester, NY 14692 USA Bausch & Lomb Inc Rochester NYUSA 14692 omb Inc, Rochester, NY 14692 USA
Titolo Testata:
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
fascicolo: 5, volume: 18, anno: 2001,
pagine: 1003 - 1015
SICI:
1084-7529(200105)18:5<1003:EORATO>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOFT CONTACT-LENSES; IN-SITU KERATOMILEUSIS; MONOCHROMATIC ABERRATIONS; WAVE-ABERRATION; PHASE PLATES; PERFORMANCE; MOVEMENT; SENSOR; VISION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Guirao, A Univ Murcia, Dept Fis, Lab Opt, E-30071 Murcia, Spain Univ Murcia Murcia Spain E-30071 ab Opt, E-30071 Murcia, Spain
Citazione:
A. Guirao et al., "Effect of rotation and translation on the expected benefit of an ideal method to correct the eye's higher-order aberrations", J OPT SOC A, 18(5), 2001, pp. 1003-1015

Abstract

ideal correcting method, such as a customized contact lens, laser refractive surgery, or adaptive optics, that corrects higher-order aberrations as well as defocus and astigmatism could improve vision. The benefit achieved with this ideal method will be limited by decentration. To estimate the significance of this potential limitation we studied the effect on image quality expected when an ideal correcting method translates or rotates with respect to the eye's pupil. Actual wave aberrations were obtained from ten humaneyes for a 7.3-mm pupil with a Shack-Hartmann sensor. We computed the residual aberrations that appear as a result of translation or rotation of an otherwise ideal correction. The model is valid for adaptive optics, contact lenses, and phase plates, but it constitutes only a first approximation to the laser refractive surgery case where tissue removal occurs. Calculationssuggest that the typical decentrations will reduce only slightly the optical benefits expected from an ideal correcting method. For typical decentrations the ideal correcting method offers a benefit in modulation 2-4 times higher (1.5-2 times in white light) than with a standard correction of defocus and astigmatism We obtained analytical expressions that show the impact of translation and rotation on individual Zernike terms. These calculationsalso reveal which aberrations are most beneficial to correct. We provided practical rules to implement a selective correction depending on the amountof decentration. An experimental study was performed with an aberrated artificial eve corrected with an adaptive optics system, validating the theoretical predictions. The results in a keratoconic subject, also corrected with adaptive optics, showed that important benefits are obtained despite decentrations in highly aberrated eyes. (C) 2001 Optical Society of America.

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Documento generato il 20/09/20 alle ore 07:40:01