Effect of supine body position on central corneal thickness

Maslin, Jessica; Teng, Christopher C.; Chadha, Nisha; Liu, Ji

doi:10.1111/ceo.12742

Cited by 3 publications

(2 citation statements)

References 44 publications

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“…For example, it was reported that body posture influenced corneal thickness measurements. 31 On the contrary, a portable OCT can overcome such a shortcoming by taking pachymetric readings in a supine position. 32 The comparison of the measurements between the devices and body positions should be investigated in the future study.…”

Section: Discussionmentioning

confidence: 99%

Investigation of the Sectorized Corneal Thickness of Eyes With Corneal Endothelial Dysfunction Using Anterior-Segment Optical Coherence Tomography

Fujishiro

Kim

Goto

et al. 2022

Cornea

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The aim of this study was to investigate the sectorized corneal thickness of eyes with corneal endothelial dysfunction using anterior-segment optical coherence tomography. Methods:We retrospectively collected anterior-segment optical coherence tomography data conducted before endothelial keratoplasty on 53 eyes of 53 patients with corneal endothelial dysfunctions including Fuchs endothelial corneal dystrophy, bullous keratopathy (BK) after trabeculectomy, and BK after laser iridotomy and from 18 normal eyes of 18 subjects. The imaging points were divided into 17 sectors. The mean for each sector was calculated and compared with the corresponding superior/inferior and temporal/ nasal sectors. Results:In the normal eyes, the superior sectors were thicker than the inferior and the temporal sectors thinner than the nasal. In the diseased eyes, the superior sectors were thicker than the inferior in all subgroups; however, this tendency was no longer observed after the values were divided by the mean for the normal eyes. No significant differences were found on horizontal comparisons; however, after the values were divided by the mean for the normal eyes, the temporal sectors were thicker than the nasal. When comparing the values between the with-hole and the without-hole sides in the BK after laser iridotomy eyes, the sectors on the withhole side were thicker than the other side.Conclusions: Corneal thickness of endothelial dysfunction was thicker in the superior sectors than the inferior but at a similar level to normal eyes. No significant differences were found for horizontal comparisons but, based on comparison with the normal eyes, the temporal sectors were thicker than the nasal.

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Section: Discussionmentioning

confidence: 99%

Investigation of the Sectorized Corneal Thickness of Eyes With Corneal Endothelial Dysfunction Using Anterior-Segment Optical Coherence Tomography

Fujishiro

Kim

Goto

et al. 2022

Cornea

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“…Body posture has been shown to influence CCT measurements. 24 Ultrasound probe pachymetry offers only point measurements and uses a contact technique (possibly altering corneal shape); Moreover, proper probe alignment by the examiner is critical for consistent readings. On the contrary, the portable OCT overcomes such shortcomings.…”

Section: Discussionmentioning

confidence: 99%

<p>Repeatability and Interchangeability of Topometric, Anterior Chamber and Corneal Wavefront Data Between Two Scheimpflug Camera Devices</p>

Gharieb¹,

Shalaby²,

Othman³

2020

OPTH

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This study aims to assess the intra-operator repeatability and correlation of the Pentacam HR (device 1) and Sirius (device 2) in measuring anterior segment parameters and to evaluate the agreement of their readings and therefore their interchangeability in a clinical setting. Methods: This is a prospective non-randomized study was conducted on the right eyes of 102 subjects coming to Eye World Hospital, Giza, Egypt. With each machine, four scans were taken by a single examiner. Each device was used to measure keratometric indices, corneal thickness, anterior chamber depth, anterior chamber angle, corneal diameter and corneal optical aberrations. Results: Both devices show high repeatability for corneal thickness, corneal diameter, anterior chamber depth and keratometric indices (except for maximum keratometry, where device 1 shows high repeatability and device 2 shows low repeatability). On the other hand, both devices show poor repeatability for anterior chamber angle, Q-values, root mean square, spherical, coma and trefoil aberrations. The readings of the two devices are strongly correlated as regards only keratometric indices, corneal thickness and anterior chamber depth. In addition, the readings of the devices are in good agreement as regards only keratometric indices (except maximum keratometry), corneal thickness, anterior chamber depth, anterior chamber angle, root mean square, spherical and trefoil aberrations. Conclusion: Both devices showed variable intra-observer repeatability, with the device 1 showing slightly higher repeatability. Despite the similarity between some of the readings of the two devices, caution is advised before considering them interchangeable. We therefore do not recommend using them in alternation in refractive surgery.

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Effect of Body Position on Intraocular Pressure Measured by Rebound Tonometer in Healthy Children

Uzlu

Akyol

Türk

et al. 2020

tjo

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Effect of supine body position on central corneal thickness

Abstract: CCT is a dynamic measurement that can be influenced by body position. It decreases linearly in the first 30 min of supine positioning at a similar rate in both open angle glaucoma patients and in healthy subjects.

Cited by 3 publications

References 44 publications

Investigation of the Sectorized Corneal Thickness of Eyes With Corneal Endothelial Dysfunction Using Anterior-Segment Optical Coherence Tomography

Investigation of the Sectorized Corneal Thickness of Eyes With Corneal Endothelial Dysfunction Using Anterior-Segment Optical Coherence Tomography

<p>Repeatability and Interchangeability of Topometric, Anterior Chamber and Corneal Wavefront Data Between Two Scheimpflug Camera Devices</p>

Effect of Body Position on Intraocular Pressure Measured by Rebound Tonometer in Healthy Children

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