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Evaluation of Corvis ST tonometer with the updated software in glaucoma practice

International Journal of Ophthalmology(English edition) 2022年第3期15卷 438-445页

作者： ioannis halkiadakis Vasilios Tzimis Alexandros Gryparis ioannis Markopoulos Vasiliki Konstadinidou Elias Zintzaras Michalis Tzakos Ophthalmiatrion Athinon Athens Eye HospitalEl Venizelou 26&Sina 2Athens 10672Greece Unit of Endocrinology Diabetes Mellitus and MetabolismAretaieion HospitalNational and Kapodistrian University of AthensSchool of MedicineAthens 11528Greece Department of Biomathematics University of Thessaly School of Medicine LarissaGreece and Institute for Clinical Research and Health Policy Studies Tufts University School of MedicineBostonMA 02111USA

AIM: To evaluate the agreement of biomechanically corrected intraocular pressure(b-IOP) and central corneal thickness(CCT) measurements obtained with the updated Corvis ST tonometer versus Goldmann applanation tonometry(GAT) and optical-based corneal pachymetry(OB-CCT) in controls, patients with ocular hypertension(OHT) and primary open angle glaucoma(POAG).Additionally, we examined the differences in corneal deformation parameters provided by the updated Corvis ST among the three ***: For each participant, GAT IOP, OB-CCT and measurements with a Corvis ST with updated software were ***-Altman analysis was used to assess the agreement between the two measurement ***: A consecutive series of 80 eyes from 80 participants(30 with POAG, 25 with OHT and 25 normal controls) were included in this prospective *** mean GAT IOP of all eyes was 17.2±3.6 mm Hg, and the mean b-IOP was 15.9±3.7 mm Hg(Spearman’s rho=0.767, P<0.001).The 95% limits of agreement(Lo As) ranged from-3.1 mm Hg to 5.5 mm Hg for GAT IOP and b-IOP.b-IOP was not correlated with OB-CCT(Spearman’s rho=-0.13 P=0.917).Meanwhile there was a weak positive corelation between OB-CCT and GAT IOP–b-IOP difference(Spearman’s rho=0.378, P=0.001).The mean OB-CCT was 549.5±36.4 μm, and the Corvis-CCT was 556.1±41.5 μm(Spearman’s rho=0.900, P<0.001).No statistically significant difference in the new indices provided by the updated Corvis ST was detected among the three *** with control eyes, POAG eyes had a significantly reduced applanation time 2 after adjusting for OB-CCT and GAT IOP(P=0.048).CONCLUSION: Corvis b-IOP and CCT correlate well with GAT IOP and OB-CCT.b-IOP is not affected by CCT, which might be an advantage, especially in thick or thin *** ST yields shorter applanation time 2 measurements in patients with POAG, which might reflect altered corneal viscoelasticity.

关键词： glaucoma tonometry intraocular pressure ocular hypertension corneal biomechanics

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Relationship between short-wavelength automatic perimetry and Heidelberg retina tomograph parameters in eyes with ocular hypertension

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International Journal of Ophthalmology(English edition) 2015年第5期8卷 1013-1017页

作者： Christos Pitsas Dimitrios Papaconstantinou Ilias Georgalas ioannis halkiadakis Department of Ophthalmology Medical SchoolUniversity of Athens Georgos Gennimatas Hospital Ophthalmiatrion Athinon Athens Eye Hospital

AIMTo compare and correlate optic nerve head parameters obtained by Heidelberg retina tomograph (HRT) with short-wavelength automatic perimetry (SWAP) indices in eyes with ocular hypertension (OHT).METHODSOne hundred and forty-six patients with OHT included in the present study. All subjects had reliable SWAP and HRT measurements performed within a 2wk period. The eyes were classified as normal/abnormal according to visual field criteria and Moorfields regression analysis (MRA). Correlations between visual field indices and HRT parameters were analyzed using Pearson correlation coefficient (r).RESULTSTwenty-nine eyes (19.9%) had SWAP defects. Twenty-nine eyes (19.9%) were classified as abnormal according to global MRA. Six eyes (4.1%) had abnormal global MRA and SWAP defects. The k statistic is 0.116 (P=0.12) indicating a very poor agreement between the methods. No statistical significant correlation between HRT and SWAP parameters was *** defects may coexist with abnormalities of optic disc detected by HRT in eyes with OHT. In most eyes, however, the two methods detect different glaucoma properties.

关键词： glaucoma perimetry optic disc ocular hypertension

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