Measurement of angle Kappa with Orbscan II and Galilei G4: effect of accommodation

Domínguez‐Vicent, Alberto; Monsálvez-Romín, Daniel; Pérez-Vives, Cari; Ferrer-Blasco, Teresa; Montés‐Micó, Robert

doi:10.1007/s00417-013-2509-y

Cited by 30 publications

(32 citation statements)

References 23 publications

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“…Basmak et al [2] reported that angle kappa values obtained by Orbscan II were significantly higher in all groups compared to synoptophore, ranging from 1.89° to 2.82°. Also, Dominguez-Vicent et al [7] reported that the mean difference in angle kappa measured with the Orbscan II and the Galilei G4 was 3.60°. As compared with this previous study, the difference in our study was relatively small.…”

Section: Discussionmentioning

confidence: 99%

“…Precise measurements can be obtained using a synoptophore or a major amblyoscope; however, these instruments are not commonly found in clinical offices. Recently, newer devices such as Orbscan II (Bausch & Lomb, Rochester, NY, USA), Galilei (Ziemer Ophthalmic Systems, Port, Switzerland), and OPD Scan II (Nidek, Gamagori, Japan) have become commercially available and can be used to evaluate angle kappa [1567]. Basmak et al [2] compared the reliability of a synoptophore and Orbscan II.…”

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confidence: 99%

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Measurement of Angle Kappa Using Ultrasound Biomicroscopy and Corneal Topography

Yeo

Moon

Lee

2017

Korean J Ophthalmol

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PurposeTo introduce a new convenient and accurate method to measure the angle kappa using ultrasound biomicroscopy (UBM) and corneal topography.MethodsData from 42 eyes (13 males and 29 females) were analyzed in this study. The angle kappa was measured using Orbscan II and calculated with UBM and corneal topography. The angle kappa of the dominant eye was compared with measurements by Orbscan II.ResultsThe mean patient age was 36.4 ± 13.8 years. The average angle kappa measured by Orbscan II was 3.98° ± 1.12°, while the average angle kappa calculated with UBM and corneal topography was 3.19° ± 1.15°. The difference in angle kappa measured by the two methods was statistically significant (p < 0.001). The two methods showed good reliability (intraclass correlation coefficient, 0.671; p < 0.001). Bland-Altman plots were used to demonstrate the agreement between the two methods.ConclusionsWe designed a new method using UBM and corneal topography to calculate the angle kappa. This method is convenient to use and allows for measurement of the angle kappa without an expensive device.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Measurement of Angle Kappa Using Ultrasound Biomicroscopy and Corneal Topography

Yeo

Moon

Lee

2017

Korean J Ophthalmol

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“…The Pentacam HR (Oculus, Wetzlar, Germany) and the Galilei G4 (Ziemer, Switzerland) are two clinical tomographers that are both based on Scheimpflug cameras. Beside corneal parameters, these devices also have the ability to measure the ACD, ACA, PD, and ACA, and they (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) or WTW distance (20)(21)(22) . However, to our knowledge, a side by side comparative study has not previously been reported.…”

Section: Introductionmentioning

confidence: 99%

“…Regarding PD and ACA mea surements, there have been no studies published using either the Pentacam/ Pentacam HR or Galilei/Galilei G4 systems. Recently, Domínguez-Vicent et al (22) , assessed the agreement between the Galilei G4 and the Orbscan II systems in order to measure the angle kappa.…”

Section: Introductionmentioning

confidence: 99%

Measurements of anterior chamber depth, white-to-white distance, anterior chamber angle, and pupil diameter using two Scheimpflug imaging devices

Domínguez‐Vicent¹,

Monsálvez-Romín²,

Águila-Carrasco³

et al. 2014

Arquivos Brasileiros De Oftalmologia

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“…The exact value can be measured using a synoptophore or major amblyoscope. Orbscan II (Bausch & Lomb, Rochester, New York, USA), Galilei (Ziemer Ophthalmic Systems, Port, Switzerland), and OPD Scan II (Nidek, Gamagori, Japan) are relatively new devices to calculate the angle kappa …”

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Estimation of angle kappa and pupil barycentre configuration in myopic tilted disc syndrome

Çankaya

Özsoy

Demirel

et al. 2020

Clinical and Experimental Optometry

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Background To evaluate the angle kappa and pupil barycentre configuration in patients with myopic tilted disc syndrome (TDS). Methods Thirty‐five eyes of 35 patients with TDS were included in the study. Thirty‐five eyes of 35 age‐ and sex‐matched healthy subjects were enrolled in the control group. All measurements were performed with the Lenstar LS 900. Angle kappa was calculated according to Pythagorean theorem using the x and y co‐ordinates of the pupil centre. Pupil dx and pupil dy values (pupil dx: x co‐ordinate of pupil centre relative to corneal apex, pupil dy: y co‐ordinate of pupil centre relative to corneal apex) were used to evaluate the pupil barycentre configuration. Central corneal thickness, white to white (cornea diameter), pupil diameter, anterior chamber depth, lens thickness, and axial length were also measured. Results The calculated mean angle kappa distance was 0.27 ± 0.15 mm in the TDS group and 0.29 ± 0.23 mm in the control group (p = 0.42). The mean pupil dx was −0.01 ± 0.24 mm in the TDS group and −0.17 ± 0.14 mm in the control group (p = 0.006). The mean pupil dy was −0.02 ± 0.13 mm in the TDS group and −0.05 ± 0.22 mm in the control group (p = 0.65). Conclusions The pupil barycentre in TDS cases was statistically significantly closer to the corneal vertex on the horizontal plane compared to the control group. However, there was no statistically significant differences in terms of angle kappa and pupil dy values between the groups. According to our results, refractive surgery can be performed safely with respect to complications related to decentration of ablation zone and decentration of multifocal intraocular lenses in these groups of patients.

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Measurement of angle Kappa with Orbscan II and Galilei G4: effect of accommodation

Abstract: For far vision, Orbscan II measured significantly higher angle kappa values than Galilei G4, the mean difference being 0.16 ± 0.08 mm. For different accommodation levels, the kappa distance did not change significantly.

Cited by 30 publications

References 23 publications

Measurement of Angle Kappa Using Ultrasound Biomicroscopy and Corneal Topography

Measurement of Angle Kappa Using Ultrasound Biomicroscopy and Corneal Topography

Measurements of anterior chamber depth, white-to-white distance, anterior chamber angle, and pupil diameter using two Scheimpflug imaging devices

Estimation of angle kappa and pupil barycentre configuration in myopic tilted disc syndrome

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