Monochromatic aberrations of the human eye in a large population

Abstract

From both a fundamental and a clinical point of view, it is necessary to know the distribution of the eye's aberrations in the normal population and to be able to describe them as efficiently as possible. We used a modified Hartmann-Shack wave-front sensor to measure the monochromatic wave aberration of both eyes for 109 normal human subjects across a 5.7-mm pupil. We analyzed the distribution of the eye's aberrations in the population and found that most Zernike modes are relatively uncorrelated with each other across the population. A principal components analysis was applied to our wave-aberration measurements with the resulting principal components providing only a slightly more compact description of the population data than Zernike modes. This indicates that Zernike modes are efficient basis functions for describing the eye's wave aberration. Even though there appears to be a random variation in the eye's aberrations from subject to subject, many aberrations in the left eye were found to be significantly correlated with their counterparts in the right eye.

Characterization of a bimorph deformable mirror using stroboscopic phase-shifting interferometry

“…There is some evidence that such a low order DM may provide sufficient correction for opthalmological AO applications. Defocus and astigmatism, which are second-order aberrations, represent 92% of the total wavefront aberrations found in subjects with normal vision [5], and the aberration magnitude diminishes with increasing radial order. The dominant higher order aberrations are coma and spherical aberration, which are third-and fourth-order aberrations and account for 1.8% and 1.6% of the total RMS wavefront error, respectively [6].…”

The influence of eye movements on monochromatic wavefront aberrations

“…Aufgrund des abnehmenden Einflusses der Aberrationen ab der fünften Ordnung an der Wellenfront (Porter et al 2001, Castejón-Mochón et al 2002, Thibos et al 2002b Der Unterschied beim Trefoil In Abbildung 48 wird die Verteilung der Differenzen der Aberrationen höherer Ordnung sowie des RMS-HO zwischen Primärposition und Infraduktion bei 6 mm Pupillenweite In Abbildung 54 wird die Verteilung der Differenzen der Aberrationen höherer Ordnung sowie des RMS-HO zwischen Primärposition und Supraduktion des Auges bei 6 mm Pupillenweite graphisch dargestellt. …”

“…Es gibt aber auch Untersucher, welche die Zernike-Koeffizienten bis zur fünften (Porter et al 2001, Hofer et al 2001 Ordnung immer kleiner und haben damit auch einen geringeren Einfluss auf die Bildqualität (Porter et al 2001, Castejón-Mochón et al 2002, Thibos et al 2002b.…”

“…Der Zernike-Defokus 0 2 Z trägt dabei naturgemäß den größten Anteil aller Zernike-Polynome an der Wellenfrontaberration (Williams et al 2000, Porter et al 2001). …”

“…Es ist bekannt, dass die optischen Aberrationen interindividuell stark variieren (Smirnov 1961, Howland und Howland 1977, Charman 1991, Porter et al 2001, Castejón-Mochón et al 2002, Wang und Koch 2003 , Artal et al 2002a, Ninomiya et al 2002, He et al 2003 …”