Irene Sisó-Fuertes1, Alberto Domínguez-Vicent2, Antonio del Águila-Carrasco2, Teresa Ferrer-Blasco2, Robert Montés-Micó2. 1. From the Faculty of Life Sciences (Sisó-Fuertes), University of Manchester, Manchester, United Kingdom; the Optometry Research Group, Optics Department (Domínguez-Vicent, del Águila-Carrasco, Ferrer-Blasco, Montés-Micó), University of Valencia, Valencia, Spain. Electronic address: irene.sisofuertes@manchester.ac.uk. 2. From the Faculty of Life Sciences (Sisó-Fuertes), University of Manchester, Manchester, United Kingdom; the Optometry Research Group, Optics Department (Domínguez-Vicent, del Águila-Carrasco, Ferrer-Blasco, Montés-Micó), University of Valencia, Valencia, Spain.
Abstract
PURPOSE: To assess whether corneal parameters and aberrations are affected by accommodation. SETTING: Optics Department, University of Valencia, Valencia, Spain. DESIGN: Prospective cross-sectional study. METHODS: The Galilei G4 dual Scheimpflug device was used to obtain data on the anterior and posterior axial curvatures, total corneal power (TCP), and corneal pachymetry from 3 corneal zones (central: 0.0 up to 4.0 mm; paracentral or mid: 4.0 up to 7.0 mm; peripheral: 7.0 up to 10.0 mm) in young emmetropic eyes in the unaccommodated and 4 accommodated states (from -1.0 to -4.0 diopters [D] in 1.0 D steps). The 2nd-, 3rd-, and 4th-order aberrations as well as the root mean square (RMS) were also determined for the entire cornea at the same accommodative demands. RESULTS: The study evaluated 7 subjects (12 eyes). No significant changes in any measured parameter were found during accommodation for any corneal zone (P > .05). Statistically significant differences were found in the various corneal zones when it was assumed they were constant with accommodation (P < .01). A stable linear trend with accommodation was also found for corneal aberrations, although individual variations existed because of the high standard deviation values. CONCLUSION: Different parameters in various zones of the cornea as well as corneal aberrations were stable during accommodation. Crown
PURPOSE: To assess whether corneal parameters and aberrations are affected by accommodation. SETTING: Optics Department, University of Valencia, Valencia, Spain. DESIGN: Prospective cross-sectional study. METHODS: The Galilei G4 dual Scheimpflug device was used to obtain data on the anterior and posterior axial curvatures, total corneal power (TCP), and corneal pachymetry from 3 corneal zones (central: 0.0 up to 4.0 mm; paracentral or mid: 4.0 up to 7.0 mm; peripheral: 7.0 up to 10.0 mm) in young emmetropic eyes in the unaccommodated and 4 accommodated states (from -1.0 to -4.0 diopters [D] in 1.0 D steps). The 2nd-, 3rd-, and 4th-order aberrations as well as the root mean square (RMS) were also determined for the entire cornea at the same accommodative demands. RESULTS: The study evaluated 7 subjects (12 eyes). No significant changes in any measured parameter were found during accommodation for any corneal zone (P > .05). Statistically significant differences were found in the various corneal zones when it was assumed they were constant with accommodation (P < .01). A stable linear trend with accommodation was also found for corneal aberrations, although individual variations existed because of the high standard deviation values. CONCLUSION: Different parameters in various zones of the cornea as well as corneal aberrations were stable during accommodation. Crown
Authors: José J Esteve-Taboada; Alberto Domínguez-Vicent; Daniel Monsálvez-Romín; Antonio J Del Águila-Carrasco; Robert Montés-Micó Journal: Graefes Arch Clin Exp Ophthalmol Date: 2017-04-20 Impact factor: 3.117
Authors: Andrzej Grzybowski; Ronald A Schachar; Magdalena Gaca-Wysocka; Ira H Schachar; Farhad Kamangar; Barbara K Pierscionek Journal: Graefes Arch Clin Exp Ophthalmol Date: 2017-11-16 Impact factor: 3.117
Authors: José J Esteve-Taboada; Teresa Ferrer-Blasco; Miguel A Aloy; José E Adsuara; Pablo Cerdá-Durán; Petar Mimica; Robert Montés-Micó Journal: Graefes Arch Clin Exp Ophthalmol Date: 2017-09-26 Impact factor: 3.117
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