Accuracy of Biometry for Intraocular Lens Implantation Using the New Partial Coherence Interferometer, AL-scan
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Purpose: To compare the refractive results of cataract surgery measured by applanation ultrasound and thenew partial coherence interferometer, AL-scan. Methods: Medical records of 76 patients and 104 eyes who underwent cataract surgery from January 2013 toJune 2013 were retrospectively reviewed. Biometries were measured using ultrasound and AL-scan and intraocularlens power was calculated using the SRK-T formula. Automatic refraction examination was done 1month after the operation, and differences between the ultrasound group and AL-scan group were comparedand analyzed by mean absolute error. Results: Mean axial length measured preoperatively by the ultrasound method was 23.53 ± 1.17 mm while thelengths measured using the AL-scan were 0.03 mm longer than that of the ultrasound group (23.56 ± 1.15mm). However, there was not a significant difference in this finding (p = 0.638). Mean absolute error was 0.34± 0.27 diopters in the ultrasound group and 0.36 ± 0.31 diopters in AL-scan group, which showed no significantdifference (p = 0.946) in precision of predicting postoperative refraction. Conclusions: Although the difference was not statistically significant, intraocular lens calculations done by theAL-scan were nearly similar in predicting postoperative refraction compared to those of applanation ultrasound,however more precise measurements may be obtained if the axial length is longer than 24.4 mm. Exceptin the case of opacity in the media, which makes obtaining measurements with the AL-scan difficult, ALscancould be a useful biometry in cataract surgery.
Abstract
Purpose: To compare the refractive results of cataract surgery measured by applanation ultrasound and thenew partial coherence interferometer, AL-scan. Methods: Medical records of 76 patients and 104 eyes who underwent cataract surgery from January 2013 toJune 2013 were retrospectively reviewed. Biometries were measured using ultrasound and AL-scan and intraocularlens power was calculated using the SRK-T formula. Automatic refraction examination was done 1month after the operation, and differences between the ultrasound group and AL-scan group were comparedand analyzed by mean absolute error. Results: Mean axial length measured preoperatively by the ultrasound method was 23.53 ± 1.17 mm while thelengths measured using the AL-scan were 0.03 mm longer than that of the ultrasound group (23.56 ± 1.15mm). However, there was not a significant difference in this finding (p = 0.638). Mean absolute error was 0.34± 0.27 diopters in the ultrasound group and 0.36 ± 0.31 diopters in AL-scan group, which showed no significantdifference (p = 0.946) in precision of predicting postoperative refraction. Conclusions: Although the difference was not statistically significant, intraocular lens calculations done by theAL-scan were nearly similar in predicting postoperative refraction compared to those of applanation ultrasound,however more precise measurements may be obtained if the axial length is longer than 24.4 mm. Exceptin the case of opacity in the media, which makes obtaining measurements with the AL-scan difficult, ALscancould be a useful biometry in cataract surgery.
참고문헌 (17)
- Olsen T, "Sources of error in intraocular lens power calculation", J Cataract Refract Surg, 18, pp.125~129 (1992)
- Giers U, "Comparison of A-scan device accuracy", J Cataract Refract Surg, 16, pp.235~242 (1990)
- Findl O, "Improved prediction of intraocular lens power using partial coherence interferometry", J Cataract Refract Surg, 27, pp.861~867 (2001)
- Nemeth J, "Optical and ultrasound measurement of axial length and anterior chamber depth for intraocular lens power calculation", J Cataract Refract Surg, 29, pp.85~88 (2003)
- Findl O, "High precision biometry of pseudophakic eyes using partial coherence interferometry", J Cataract Refract Surg, 24, pp.1087~1093 (1998)
- Rajan MS, "Partial coherence laser interferometry vs conventional ultrasound biometry in intraocular lens power calculations", Eye, 16, pp.552~556 (2002)
- Cruysberg LP, "Evaluation of the Lenstar LS 900 non-contact biometer", Br J Ophthalmol, 94, pp.106~110 (2010)
- Buckhurst PJ, "A new optical low coherence reflectometry device for ocular biometry in cataract patients", Br J Ophthalmol, 93, pp.949~953 (2009)
- Hasemeyer S, "Preoperative biometry of cataractous eyes using partial coherence laser interferometry", Graefes Arch Clin Exp Ophthalmol, 241, pp.251~252 (2003)
- 이민규, "안구 길이와 유리체절제술이 SRK", T 공식의 굴절 오차에 미치는 영향, 2013, pp.54(2), 257~264[DOI]
- Drexler W, "Partial coherence interferometry: a novel approach to biometry in cataract surgery", Am J Ophthalmol, 126, pp.524~534 (1998)
- Haigis W, "Comparison of immersion ultrasound biometry and partial coherence interferometry for intraocular lens calculation according to Haigis", Graefes Arch Clin Exp Ophthalmol, 238, pp.765~773 (2000)
- Tehrani M, "Evaluation of the practicality of optical biometry and applanation ultrasound in 253 eyes", J Cataract Refract Surg, 29, pp.741~746 (2003)
- Packer M, "Immersion A-scan compared with partial coherence interferometry: outcomes analysis", J Cataract Refract Surg, 28, pp.239~242 (2002)
- Kiss B, "Refractive outcome of cataract surgery using partial coherence interferometry and ultrasound biometry: clinical feasibility study of a commercial prototype II", J Cataract Ref ract Surg, 28, pp.230~234 (2002)
- 송병용, "인공수정체 도수계산에 있어 부분결합간섭계의 정확성", 대한안과학회지, 46(5), pp.775~780 (2005), 대한안과학회
- Madge SN, "Optimization of biometry for intraocular lens implantation using the Zeiss IOLMaster", Acta Ophthalmol Scand, 83, pp.436~438 (2005)