Abstract
Background
The purpose of the study was to assess intraobserver and interobserver repeatability of eight ocular components measurement in cataract eyes using the optical low-coherence reflectometer Lenstar LS 900®.
Methods
Five consecutive measurements of ocular components were taken by two examiners using the Lenstar. Components analyzed were: central corneal thickness, lens thickness, anterior chamber depth, axial length, retinal thickness, keratometry, white-to-white distance, and pupillometry. Within-subject standard deviation and the coefficient of variation were calculated for evaluation of intraobserver repeatability. Bland–Altman analysis was used for assessment of interobserver repeatability.
Results
Thirty-two eyes of 22 patients were included. For both observers, the smallest intraobserver coefficient of variation was obtained for axial length, while the largest was found for corneal steepest meridian position. Interobserver repeatability demonstrated less repeatable results for white-to-white distance and corneal steepest meridian position. Considering axial length and anterior chamber depth values, predicted refractive error was 0 ± 0.05 D and 0.02 ± 0.19 D respectively in 95% of observations.
Conclusion
The Lenstar LS 900® evidenced excellent repeatability and observers´ independent results of all components analyzed except white-to-white distance and corneal steepest meridian position measurements. To the best of our knowledge, this is the first study on interobserver repeatability of optical low-coherence reflectometry in cataract eyes.
Similar content being viewed by others
References
Leaming DV (2004) Practice styles and preferences of ASCRS members—2003 survey. J Cataract Refract Surg 30:892–900
Bland JM, Altman DG (1986) Statistical methods for assessing agreement between two methods of clinical measurement. Lancet 1:307–310
Bland JM, Altman DG (1996) Measurement error. BMJ 313:744
Myles PS, Cui J (2007) Using Bland–Altman method to measure agreement with repeated measures. Br J Anaesth 99:309–311
Buckhurst PJ, Wolffsohn JS, Shah S, Naroo SA, Davies LN, Berrow EJ (2009) A new optical low coherence reflectometry device for ocular biometry in cataract patients. Br J Ophthalmol 93:949–953
Cruysberg LP, Doors M, Verbakel F, Berendschot TTJM, De Brabander J, Nuijts RMMA (2010) Evaluation of the Lenstar LS 900 all-in-one non contact biometry meter. Br J Ophthalmol 94:106–110
Rohrer K, Frueh BE, Wälti R, Clemetson IA, Tappeiner C, Goldblum D (2009) Comparison and evaluation of ocular biometry using a new noncontact optical low-coherence reflectometer. Ophthalmology 116:2087–2092
Liampa Z, Kynigopoulos M, Pallas G, Gerding H (2010) Comparison of two partial coherence interferometry devices for ocular biometry. Klin Monatsbl Augenheilkd 227:285–288
Holzer MP, Mamusa M, Auffarth GU (2009) Accuracy of a new partial coherence interferometry analyser for biometric measurements. Br J Ophthalmol 93:807–810
Hoffer KJ, Shammas HJ, Savini G (2010) Comparison of 2 laser instruments for measuring axial length. J Cataract Refract Surg 36:644–648, Erratum in: J Cataract Refract Surg 36:1066
Tappainer C, Rohrer K, Frueh BE, Waelti R, Goldblum D (2010) Clinical comparison of biometry using the non-contact optical low coherence reflectometer (Lenstar LS 900) and contact ultrasound biometer (Tomey AL-3000) in cataract eyes. Br J Ophthalmol 94:666–667
Baumeister M, Terzi E, Ekici Y, Kohnen T (2004) Comparison of manual and automated methods to determine horizontal corneal diameter. J Cataract Refract Surg 30:374–380
Piñero DP, Plaza Puche AB, Alió JL (2007) Corneal diameter measurements by corneal topography and angle to angle measurements by optical coherence tomography: Evaluation of equivalence. J Cataract Refract Surg 34:126–131
Olsen T (2007) Calculation of intraocular lens power: a review. Acta Ophthalmol Scand 85:472–485
Kiss B, Findl O, Menapace R, Wirtitsch M, Petternel V, Drexler W, Rainer G, Georgopoulos M, Hitzenberger CK, Fercher AF (2002) Refractive outcome of cataract surgery using partial coherence interferometry and ultrasound biometry. Clinical feasibility study of a commercial prototype II. J Cataract Refract Surg 28:230–234
Packer M, Fine IH, Hoffman RS, Coffman PG, Brown LK (2002) Immersion A-scan compared with partial coherence interferometry. Outcomes analysis. J Cataract Refract Surg 28:239–242
Narváez J, Cherwek DH, Stulting RD, Waldron R, Zimmerman GJ, Wessels IF, Waring GO 3rd (2008) Comparing immersion ultrasound with partial coherence interferometry for intraocular lens power calculation. Ophthalmic Surg Lasers Imaging 39:30–34
Olsen T (2007) Improved accuracy of intraocular lens power calculation with the Zeiss IOLMaster. Acta Ophthalmol Scand 85:84–87
Rajan MS, Keilhorn I, Bell JA (2002) Partial coherence laser interferometry vs conventional ultrasound biometry in intraocular lens power calculation. Eye 16:552–556
Haigis W, Lege B, Miller N, Schneider B (2000) Comparison of immersion ultrasound biometry and partial coherence interferometry for intraocular lens calculation according to Haigis. Graefes Arch Clin Exp Ophthalmol 238:765–773
Author information
Authors and Affiliations
Corresponding author
Additional information
The authors have full control of all primary data, and they agree to allow Graefe's Archive for Clinical and Experimental Ophthalmology’ to review their data if requested.
None of the authors has a financial or proprietary interest in any material or method mentioned.
Rights and permissions
About this article
Cite this article
Bjeloš Rončević, M., Bušić, M., Čima, I. et al. Intraobserver and interobserver repeatability of ocular components measurement in cataract eyes using a new optical low coherence reflectometer. Graefes Arch Clin Exp Ophthalmol 249, 83–87 (2011). https://doi.org/10.1007/s00417-010-1546-z
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00417-010-1546-z