Posterior corneal astigmatism in refractive lens exchange surgery

Acta Ophthalmologica
Elin RydströmAnders Behndig

Abstract

To assess the anterior, posterior and total corneal spherical and astigmatic powers in patients undergoing refractive lens exchange (RLE) surgery. In 402 consecutive patients planned for RLE at Koskelas Eye Clinic, Luleå, Sweden, right eye data from pre- and postoperative subjective refraction, preoperative IOLMaster(®) biometry and Pentacam HR(®) measurements were collected. Postoperative Pentacam HR(®) data were collected for 54 of the patients. The spherical and astigmatic powers of the anterior and posterior corneal surfaces and for the total cornea were assessed and compared, and surgically, induced astigmatism was calculated using vector analysis. The spherical power of the anterior corneal surface was 48.18 ± 1.69D with an astigmatic power of 0.83 ± 0.54D. The corresponding values for the posterior surface were -6.05 ± 2,52D and 0.26 ± 0.15D, respectively. The total corneal spherical power calculated with ray tracing was 42.47 ± 2.89D with a 0.72 ± 0.48D astigmatic power, and the corresponding figures obtained by estimating the posterior corneal surface were 43.25 ± 1.51D (p < 0.001) with a 0.75 ± 0.49D astigmatic power (p = 0.003). In eyes with anterior astigmatism with-the-rule, the total corneal astigmatism is overest...Continue Reading

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Citations

May 26, 2018·Current Opinion in Ophthalmology·Ari Brandsdorfer, Joann J Kang
Apr 30, 2020·Journal of Cataract and Refractive Surgery·Mehdi ShajariWolfgang J Mayer
May 8, 2020·Journal of Cataract and Refractive Surgery·Maria Alejandra HenriquezLuis Izquierdo
Aug 5, 2021·Clinical Ophthalmology·Sudi Patel, Larysa Tutchenko
Aug 28, 2021·Diagnostics·Piotr KanclerzXiaogang Wang

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