Intra-operative Autorefraction for Intraocular Lens Power Calculation in Cataract Surgery

Authors

  • Pornchai Simaroj Department of Ophthalmology, Ramathibodi Hospital, Faculty of Medicine, Mahidol University
  • Sarintip Tung-yoo-suk Department of Ophthalmology, Ramathibodi Hospital, Faculty of Medicine, Mahidol University
  • Kaevalin Lekhanont Department of Ophthalmology, Ramathibodi Hospital, Faculty of Medicine, Mahidol University

Keywords:

Intra-operative autorefraction, , IOL power calculation, cataract surgery

Abstract

Objective: To evaluate the correlation between the refractive state of an aphakic eye after phacoemulsification and the appropriate intraocular lens (IOL) power for emmetropia.

Methods: This was a prospective, noncomparative consecutive case series study conducted in the Department of Ophthalmology, Ramathibodi Hospital, Bangkok, Thailand. A total of 57 patients underwent phacoemulsification with foldable IOL implantation by a single surgeon. The intra-operative autorefraction was performed by another assisting surgeon prior to IOL implantation. The implanted IOL power and 1-month post-operative spherical equivalent (SE) were used to retrospectively calculate the predicted IOL power for emmetropia. The correlation between intra-operative aphakic SE and the predicted IOL power for emmetropia was evaluated.

Results: Fifty seven patients with a mean age of 67.53 years (SD = 7.52) were included in the study. A linear relationship between intra-operative aphakic SE and predicted IOL power achieving plano was found with a formula: predicted IOL power (Diopter; D) = 9.416 + 1.107 (intra-operative aphakic SE), when the intra-operative aphakic SE range was + 7.25 to +16.25 D, with A-constant of 118.7.

Conclusion: There is a linear relationship between intra-operative aphakic SE and predicted IOL power. Intra-operative autorefraction may be a simple and reliable method for IOL power calculation in cataract surgery.

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Published

31-07-2020

How to Cite

Simaroj, P., Tung-yoo-suk, S. ., & Lekhanont, . K. . (2020). Intra-operative Autorefraction for Intraocular Lens Power Calculation in Cataract Surgery. Siriraj Medical Journal, 62(5), 199–201. Retrieved from https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/243904

Issue

Vol. 62 No. 5 (2010): Sep-Oct

Section

Original Article

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