In vivo measurement of posterior chamber intraocular lens decentration and tilt
J. D. Auran, C. J. Koester and A. Donn
Department of Ophthalmology, Columbia University College of Physicians and Surgeons, New York, NY.
We report what to our knowledge is the first extensive in vivo clinical
study of intraocular lens decentration and tilt. Measurements of posterior
chamber intraocular lenses, all implanted by the same surgeon in 89 eyes,
showed that decentration and tilt consistently differed between right and
left eyes. Lenses tended to decenter superotemporally and tilt with their
superonasal edges tipped forward. Decentration magnitude relative to the
cornea light reflex axis and line of sight averaged 0.64 mm, with
decentration increasing slightly with increased axial length. Average tilt
was 6.75 degrees, and the average tilt-induced astigmatism was 0.27
diopter. Tilt magnitude decreased with increased axial length, as did
tilt-induced astigmatism and plus sphere.
