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KMID : 1191420120110010036
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Korean Journal of Optometry and Vision Science
2012 Volume.11 No. 1 p.36 ~ p.41
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Intraocular Lens Power Calculation Using Partial Coherence Interferometry in Silicone Oil-Filled Eyes
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Kang Seung-bum
Roh Young-Jung
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Abstract
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Purpose: To evaluate the accuracy of intraocular lens (IOL) power calculation in eyes that have been operated on by silicone oil removal combined with IOL implantation using partial coherence interferometry.
Methods: 10 eyes of 10 patients with silicone oil tamponade were included in this study. The IOL power calculation for 10 eyes was performed using partial coherence interferometry. 12 eyes of 12 patients with silicone oil tamponade were also included in this study as control group. 12 eyes in control group had IOL implantation after silicone oil removal. The IOL power calculation for control group was performed using conventional ultrasound A-scan (Tomey, Nagoya, Japan). Three months after silicone oil removal combined with IOL implantation, actual refraction was measured. To compare the difference between the actual and target refraction, refractive prediction error was calculated. It is defined as substraction of target refraction from actual refraction.
Results: At three months, actual refraction and refractive prediction error of the group using partial coherence interferometry were －1.30±1.57 diopter and －0.08±1.04 diopter, respectively. At three months, actual refraction and refractive prediction error of the control group using ultrasound A-scan were －1.63±1.75 diopter and －0.48±1.27 diopter, respectively. There was no statistically significant difference between two values (p=0.674).
Conclusions: Partial coherence interferometry seems to be satisfactory accurate method to calculate IOL power in silicone oil-filled eye.
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KEYWORD
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Interferometry, Silicone oils, Intraocular lens
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