Effect of tear film break-up on higher-order aberrations measured with wavefront sensor - 02/09/11

Doi : 10.1016/S0002-9394(02)01430-7

Shizuka Koh, MD ^a, Naoyuki Maeda, MD ⁎, ^a,^b , Teruhito Kuroda, MD ^a,^b, Yuichi Hori, MD ^a, Hitoshi Watanabe, MD ^a, Takashi Fujikado, MD ^a,^b, Yasuo Tano, MD ^a, Yoko Hirohara, BS ^c, Toshifumi Mihashi ^c : BE
^a Department of Ophthalmology (S.K., N.M., T.K., Y.H., H.W., T.F., Y.T.), Suita, Japan
^b Department of Medical Robotics and Image Sciences, Osaka University Medical School, Suita, Japan (N.M., T.K., T.F.)
^c Technical Research Institute, Topcon Corporation (Y.H., T.M.), Tokyo, Japan

^*Inquiries to Naoyuki Maeda, MD, Department of Ophthalmology, Osaka University Medical School, Room E7, 2-2 Yamadaoka, Suita, 565-0871, Japan; fax: (+81)6-6879-3458

Abstract

PURPOSE: To investigate whether optical wavefront aberrations vary with tear film break-up.

DESIGN: Observational case series.

METHODS: Higher-order aberrations were examined for 20 eyes of 20 normal subjects with a Hartmann-Shack wavefront sensor before and after tear film break-up.

RESULTS: Higher-order aberrations for photopic vision (central 4 mm diameter) after tear film break-up increased 1.44 fold compared to higher-order aberrations before tear film break-up (P = .001, paired t-test). Higher-order aberrations after tear film break-up for scotopic vision (central 6 mm diameter) were also 1.23 times higher than those before break-up (P = .005, paired t-test).

CONCLUSION: Wavefront sensing enabled us to evaluate the induced irregular astigmatism caused by tear film break-up quantitatively. Wavefront aberrations should be measured carefully to avoid the effects of tear film break-up, especially in wavefront-guided refractive surgery.

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Supported in part by Grant-in-Aid 11671737 (Dr. Maeda) and 1038769 (Dr. Watanabe) Scientific Research from the Japanese Ministry of the Education, Science, Sports, and Culture and by a research grant from the Osaka Eye Bank Foundation grant, Suita, Japan (Drs. Maeda and Watanabe). Mr. Mihashi and Ms. Hirohara are employers of Topcon Corporation.

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Vol 134 - N° 1

P. 115-117 - juillet 2002 Retour au numéro

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Effect of tear film break-up on higher-order aberrations measured with wavefront sensor - 02/09/11

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