Refractive Predictability of Partial Coherence Interferometry and Factors that can Affect It
1
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
Purpose: To evaluate the refractive predictability of a partial coherence interferometry (PCI) biometry device (IOL Master®) for cataract surgery and to investigate factors that may affect it. Methods: Retrospective review of 209 eyes from 151 patients that had undergone preoperative PCI biometry and an uneventful phacoemulsification cataract surgery with posterior chamber intraocular lens (IOL) implantation was conducted. Prediction error defined as the intended refraction minus the postoperative refraction in spherical equivalent (SE) and the absolute error were analyzed according to IOL calculation formulas, patient characteristics, preoperative visual acuity (VA) and refraction, posterior subcapsular cataract (PSC), signal-to-noise ratio (SNR), and axial length (AL). Results: The overall refractive predictability of the PCI device was good. Generally, the SRK/T formula performed better than the SRK-II formula. Refractive predictability was slightly worse in eyes with ≥+2.0 diopters (D) of preoperative SE (with both SRK-Ⅱ and SRK/T) and in eyes with an AL≤23.0 ㎜ (only with SRK-Ⅱ. No other factors significantly affected the refractive predictability of the PCI, although poor VA, dense PSC, and poor SNR were closely interrelated. Conclusions: The SRK/T formula performed significantly better than the SRK-Ⅱ formula. Eyes with an AL≤23.0 ㎜ were associated with significantly greater hyperopic shifts in postoperative refraction with the SRK-Ⅱ formula, but not with the SRK/T formula. A preoperative SE≥+2.0D was related to a significantly greater hyperopic shift in postoperative refraction. With proper verification of measured data and a suitable IOL calculation formula, good refractive predictability is expected from PCI biometry regardless of patient characteristics, preoperative VA, SNR, PSC, and AL.
Abstract
Purpose: To evaluate the refractive predictability of a partial coherence interferometry (PCI) biometry device (IOL Master®) for cataract surgery and to investigate factors that may affect it. Methods: Retrospective review of 209 eyes from 151 patients that had undergone preoperative PCI biometry and an uneventful phacoemulsification cataract surgery with posterior chamber intraocular lens (IOL) implantation was conducted. Prediction error defined as the intended refraction minus the postoperative refraction in spherical equivalent (SE) and the absolute error were analyzed according to IOL calculation formulas, patient characteristics, preoperative visual acuity (VA) and refraction, posterior subcapsular cataract (PSC), signal-to-noise ratio (SNR), and axial length (AL). Results: The overall refractive predictability of the PCI device was good. Generally, the SRK/T formula performed better than the SRK-II formula. Refractive predictability was slightly worse in eyes with ≥+2.0 diopters (D) of preoperative SE (with both SRK-Ⅱ and SRK/T) and in eyes with an AL≤23.0 ㎜ (only with SRK-Ⅱ. No other factors significantly affected the refractive predictability of the PCI, although poor VA, dense PSC, and poor SNR were closely interrelated. Conclusions: The SRK/T formula performed significantly better than the SRK-Ⅱ formula. Eyes with an AL≤23.0 ㎜ were associated with significantly greater hyperopic shifts in postoperative refraction with the SRK-Ⅱ formula, but not with the SRK/T formula. A preoperative SE≥+2.0D was related to a significantly greater hyperopic shift in postoperative refraction. With proper verification of measured data and a suitable IOL calculation formula, good refractive predictability is expected from PCI biometry regardless of patient characteristics, preoperative VA, SNR, PSC, and AL.
참고문헌 (36)
- Olsen T, "Sources of error in intraocular lens power calculation", J Cataract Refract Surg, 18, pp.125~129 (1992)
- Cannors R, "Accuracy and reproducibility of biometry using partial coherence interferometry", J Cataract Refract Surg, 28, pp.235~238 (2002)
- Rajan MS, "Partial coherence laser interferometry vs. conventional ultrasound biometry in intraocular lens power calculations", Eye, 16, pp.552~556 (2002)
- Norrby S, "Comparison of 2 A-scans", J Cataract Refract Surg, 29, pp.95~99 (2003)
- Findl O, "Influence of operator experience on the performance of ultrasound biometry compared to optical biometry before cataract surgery", J Cataract Refract Surg, 29, pp.1950~1955 (2003)
- 최재혁, "IOL Master로 측정된 생체 계수의 재현성과 정확성", 대한안과학회지, 45(10), pp.10~10 (2004), 대한안과학회
- Kiss B, "Biometry of cataractous eyes using partial coherence interferometry: clinical feasibility study of a commercial prototype I", J Cataract Refract Surg, 28, pp.224~229 (2002)
- Vogel A, "Reproducibility of optical biometry using partial coherence interferometry : intraobserver and interobserver reliability", J Cataract Refract Surg, 27, pp.1961~1968 (2001)
- Haigis W, "Comparison of immersion ultrasound biometry and partial coherence interferometry for intraocular lens calculation according to Haigis", Graefe’s Arch Clin Exp Ophthalmolol, 238, pp.765~773 (2000)
- Goyal R, "Comparison of laser interferometry and ultrasound A-scan in the measurement of axial length", Acta Ophthalmol Scand, 81, pp.331~335 (2003)
- Kim HJ, "Comparison of IOL Master, A-scan and Orbscan II for measurement of axial length and anterior chamber depth", J Korean Ophthalmol Soc, 44, pp.1519~1527 (2003)
- Packer M, "Immersion A-scan compared with partial coherence interferometry: Outcomes analysis", J Cataract Refract Surg, 28, pp.239~242 (2002)
- 이정탁, "Partial Coherence Interferometry를 이용한 안축장의 측정", 대한안과학회지, 44(4), pp.7~817 (2003), 대한안과학회
- Lee AC, "Biometry and intraocular lens power calculation", Curr Opin Ophthalmol, 19, pp.13~17 (2008)
- Suto C, "Influence of the signal-to- noise ration on the accuracy of IOLMaster measurements", J Cataract Refract Surg, 33, pp.2062~2066 (2007)
- Olsen T, "Calibration of axial length measurements with the Zeiss IOLMaster", J Cataract Refract Surg, 31, pp.1345~1350 (2005)
- Tehrani M, "Evaluation of the practicality of optical biometry and applanation ultrasound in 253 eyes", J Cataract Refract Surg, 29, pp.741~746 (2003)
- 송병용, "인공수정체 도수계산에 있어 부분결합간섭계의 정확성", 대한안과학회지, 46(5), pp.775~780 (2005), 대한안과학회
- Häsemeyer S, "Preoperative biometry of cataractous eyes using partial coherence laser interferometry", Graefes Arch Clin Exp Ophthalmol, 241, pp.251~252 (2003)
- Ueda T, "Impact of nuclear cataract density on postoperative refractive outcome: IOL Master versus ultrasound", Ophthalmologica, 221, pp.384~387 (2007)
- Chylack LT, "The lens opacities classification system III", The Longitudinal Study of Cataract Study Group: Arch Ophthalmol, 111, pp.831~836 (1993)
- Findl O, "Improved prediction of intraocular lens power using partial coherence interferometry", J Cataract Refract Surg, 27, pp.861~867 (2001)
- Eleftheriadis H, "IOL Master biometry: refractive results of 100 consecutive cases", Br J Ophthalmol, 87, pp.960~963 (2003)
- Kiss B, "Refractive outcome of cataract surgery using partial coherence interferometry and ultrasound biometry", J Cataract Refract Surg, 28, pp.230~234 (2002)
- 황준서, "부분결합간섭계와 초음파를 이용한 안축장 측정시 백내장 수술 후 굴절력 예측의 비교", 대한안과학회지, 48(1), pp.27~32 (2007), 대한안과학회
- Olsen T, "Improved accuracy of intraocular lens power calculation with the Zeiss IOLMaster", Acta Ophthalmol Scand, 85, pp.84~87 (2007)
- Elder MJ, "Predicting the refractive outcome after cataract surgery: the comparison of different IOLs and SRK-II and SRK-T", Br J Ophthalmol, 86, pp.620~622 (2002)
- Freeman G, "The impact of cataract severity on measurement acquisition with the IOL Master", Acta Ophthalmol Scand, 83, pp.439~442 (2005)
- Hitzenberger CK, "Measurement of the axial length of cataract eyes by laser Doppler interferometry", Invest Ophthalmol Vis Sci, 34, pp.1886~1893 (1993)
- Prinz A, "Influence of severity of nuclear cataract on optical biometry", J Cataract Refract Surg, 32, pp.1161~1165 (2006)
- Norrby S, "Sources of error in intraocular lens power calculation", J Cataract Refract Surg, 34, pp.368~376 (2008)
- Wang JK, "Intraocular lens power calculation using the IOLMaster and various formulas in eyes with long axial length", J Cataract Refract Surg, 34, pp.262~267 (2008)
- 정진권, "고도근시 환자에서 부분결합간섭계와 초음파를 이용한 생체측정", 대한안과학회지, 47(3), pp.355~3 (2006), 대한안과학회
- Olsen T, "Calculation of intraocular lens power: a review", Acta Ophthalmol Scand, 85, pp.472~485 (2007)
- Preussner PR, "Accuracy limits in IOL calculation: current status", Klin Monatsbl Augenheilkd, 224, pp.893~899 (2007)
- Leinonen J, "Repeatability (test- retest variability) of refractive error measurement in clinical settings", Acta Ophthalmol Scand, 84, pp.532~536 (2006)