Comparison of Anterior Segment Measurements with a New Multifunctional Unit and Five Other Devices

Overview

Journal Korean J Ophthalmol

Specialty Ophthalmology

Date 2022 Jun 29

PMID 35766048

Authors

Bo Yi Kim

Ikhyun Jun

Affiliations

Soon will be listed here.

Abstract

Purpose: To evaluate the clinical availability of a multifunctional ocular biometric unit, MR-6000, for simultaneous keratometry, tonometry, topography, and pachymetry evaluation, and compare anterior segment measurements with five other devices: autokeratometer (KR-1), Scheimpflug camera (Pentacam HR), swept-source optical coherence tomography (IOLMaster 700), Placido disk scanning-slit topography (Orbscan II), and noncontact tonometry (FT-1000).

Methods: Thirty eyes from thirty patients who visited Severance Hospital for cataract surgery were examined using MR6000 and the other devices. The mean keratometry, central corneal thickness (CCT), white-to-white (WTW) distance, and intraocular pressure (IOP) values were compared. Repeated measures analysis of variance, Wilcoxon signed-rank test, intraclass correlation coefficient (ICC), and Bland-Altman plot were used to assess the correlation and agreement between devices.

Results: Thirty eyes of thirty patients were evaluated. Statistically significant differences in mean keratometry between MR6000, KR-1, Pentacam HR, and IOLMaster 700 were not observed (p > 0.05). All five devices, including Orbscan II, had almost perfect agreement in measuring keratometry (ICC > 0.80, p < 0.05). CCT measured by MR-6000 was significantly different from that of Pentacam HR and Orbscan II measurements (p < 0.05) but correlated with that of Pentacam HR and Orbscan II measurements (ICC > 0.60, p < 0.05). The WTW distance measured by MR-6000 was not significantly different from that measured by IOLMaster 700 but was different from that measured by Orbscan II. IOP measured by MR-6000 was not correlated with FT-1000.

Conclusions: Keratometric values obtained through MR-6000 can be used interchangeably with other devices based on good correlation and agreement. However, the CCT, WTW, and IOP values were not interchangeable with a single multifunctional unit for cataract surgery preoperative examination.

References

Meyer J, Gokul A, Vellara H, Prime Z, McGhee C . Repeatability and Agreement of Orbscan II, Pentacam HR, and Galilei Tomography Systems in Corneas With Keratoconus. Am J Ophthalmol. 2016; 175:122-128. DOI: 10.1016/j.ajo.2016.12.003. View

Oh J, Shin H, Kim J, Kim H, Song J . Direct measurement of the ciliary sulcus diameter by 35-megahertz ultrasound biomicroscopy. Ophthalmology. 2007; 114(9):1685-8. DOI: 10.1016/j.ophtha.2006.12.018. View

Graf M . [Significance of the corneal thickness in non-contact tonometry]. Klin Monbl Augenheilkd. 1991; 199(3):183-6. DOI: 10.1055/s-2008-1046068. View

Reinstein D, Lovisolo C, Archer T, Gobbe M . Comparison of postoperative vault height predictability using white-to-white or sulcus diameter-based sizing for the visian implantable collamer lens. J Refract Surg. 2013; 29(1):30-5. DOI: 10.3928/1081597X-20121210-02. View

Hoffer K, Hoffmann P, Savini G . Comparison of a new optical biometer using swept-source optical coherence tomography and a biometer using optical low-coherence reflectometry. J Cataract Refract Surg. 2016; 42(8):1165-72. DOI: 10.1016/j.jcrs.2016.07.013. View

Dinc U, Oncel B, Gorgun E, Yenerel M, Alimgil L . Assessment and comparison of anterior chamber dimensions using various imaging techniques. Ophthalmic Surg Lasers Imaging. 2010; 41(1):115-22. DOI: 10.3928/15428877-20091230-21. View

Anayol M, Guler E, Yagci R, Sekeroglu M, Ylmazoglu M, Trhs H . Comparison of central corneal thickness, thinnest corneal thickness, anterior chamber depth, and simulated keratometry using galilei, Pentacam, and Sirius devices. Cornea. 2014; 33(6):582-6. DOI: 10.1097/ICO.0000000000000119. View

Tajbakhsh Z, Salouti R, Nowroozzadeh M, Aghazadeh-Amiri M, Tabatabaee S, Zamani M . Comparison of keratometry measurements using the Pentacam HR, the Orbscan IIz, and the TMS-4 topographer. Ophthalmic Physiol Opt. 2012; 32(6):539-46. DOI: 10.1111/j.1475-1313.2012.00942.x. View

Hashemi H, Mehravaran S . Central corneal thickness measurement with Pentacam, Orbscan II, and ultrasound devices before and after laser refractive surgery for myopia. J Cataract Refract Surg. 2007; 33(10):1701-7. DOI: 10.1016/j.jcrs.2007.05.040. View

10.

Lackner B, Schmidinger G, Pieh S, Funovics M, Skorpik C . Repeatability and reproducibility of central corneal thickness measurement with Pentacam, Orbscan, and ultrasound. Optom Vis Sci. 2005; 82(10):892-9. DOI: 10.1097/01.opx.0000180817.46312.0a. View

11.

Recep O, Hasiripi H, Cagil N, Sarikatipoglu H . Relation between corneal thickness and intraocular pressure measurement by noncontact and applanation tonometry. J Cataract Refract Surg. 2001; 27(11):1787-91. DOI: 10.1016/s0886-3350(01)00900-2. View

12.

Savini G, Carbonelli M, Sbreglia A, Barboni P, Deluigi G, Hoffer K . Comparison of anterior segment measurements by 3 Scheimpflug tomographers and 1 Placido corneal topographer. J Cataract Refract Surg. 2011; 37(9):1679-85. DOI: 10.1016/j.jcrs.2011.03.055. View

13.

Huang J, Pesudovs K, Wen D, Chen S, Wright T, Wang X . Comparison of anterior segment measurements with rotating Scheimpflug photography and partial coherence reflectometry. J Cataract Refract Surg. 2011; 37(2):341-8. DOI: 10.1016/j.jcrs.2010.08.044. View

14.

Speicher L . Intra-ocular lens calculation status after corneal refractive surgery. Curr Opin Ophthalmol. 2001; 12(1):17-29. DOI: 10.1097/00055735-200102000-00005. View

15.

Rose L, Moshegov C . Comparison of the Zeiss IOLMaster and applanation A-scan ultrasound: biometry for intraocular lens calculation. Clin Exp Ophthalmol. 2003; 31(2):121-4. DOI: 10.1046/j.1442-9071.2003.00617.x. View

16.

Sheng H, Bottjer C, Bullimore M . Ocular component measurement using the Zeiss IOLMaster. Optom Vis Sci. 2004; 81(1):27-34. DOI: 10.1097/00006324-200401000-00007. View

17.

Mamalis N . Complications of foldable intraocular lenses requiring explanation or secondary intervention--1998 survey. J Cataract Refract Surg. 2000; 26(5):766-72. DOI: 10.1016/s0886-3350(00)00424-7. View

18.

Rabsilber T, Khoramnia R, Auffarth G . Anterior chamber measurements using Pentacam rotating Scheimpflug camera. J Cataract Refract Surg. 2006; 32(3):456-9. DOI: 10.1016/j.jcrs.2005.12.103. View

19.

Lee Y, Choi C, Yoon G . Comparison of dual rotating Scheimpflug-Placido, swept-source optical coherence tomography, and Placido-scanning-slit systems. J Cataract Refract Surg. 2015; 41(5):1018-29. DOI: 10.1016/j.jcrs.2014.08.040. View

20.

Altman D, Bland J . Statistics notes: the normal distribution. BMJ. 1995; 310(6975):298. PMC: 2548695. DOI: 10.1136/bmj.310.6975.298. View