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Effect of head tilt on repeatability of optic nerve head parameters using Cirrus spectral-domain optical coherence tomography

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International Journal of Ophthalmology(English edition) 2016年第8期9卷 1170-1175页

作者： Lilian Hui Li Koh Muhammad Amir Ismail Sae Cheong Yap elizabeth poh ying wong Leonard Wei Leon Yip Department of Ophthalmology Tan Tock Seng HospitalNational Healthcare Group Eye Institute

AIMTo assess the repeatability of measuring optic nerve head (ONH) parameters using the Cirrus optical coherence tomography (OCT), as well as to assess the effect of head tilt on these *** healthy participants with no evidence of glaucoma were recruited for the study. Visual acuity, intraocular pressure, standard automated perimetry and ocular examination were performed for each participant. One eye was then randomly selected and scanned undilated with the Cirrus OCT in 3 positions (neutral, 30° right tilt and 30° left tilt).RESULTSData collected from 29 eyes were used for analysis. One patient was omitted due to poor scan quality. The repeatability of the ONH parameters was analyzed using analysis of variance, coefficient of variation (COV) and intraclass correlation coefficient (ICC). Analysis of variance showed no statistically significant difference between 3 scans in a single position. There was good agreement between measurements (ICC 0.919-0.996, COV 1.94%-5.48%). Even with the presence of head tilt, repeated scans in the 3 positions showed good agreement as well (ICC 0.888-0.996, COV 2.04%-5.39%).CONCLUSIONSerial measurements of ONH parameters using the Cirrus OCT are found to have good repeatability. The ONH parameters with Cirrus OCT also maintain good repeatability despite head tilt.

关键词： glaucoma imaging artifacts optical coherence tomography head movements

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Agreement of angle closure assessments between gonioscopy, anterior segment optical coherence tomography and spectral domain optical coherence tomography

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International Journal of Ophthalmology(English edition) 2015年第2期8卷 342-346页

作者： Elton Lik Tong Tay Vernon Khet Yau Yong Boon Ang Lim Stelson Sia elizabeth poh ying wong Leonard Wei Leon Yip Department of Ophthalmology Tan Tock Seng Hospital Republic of Singapore Air Force Aeromedical Centre Cardinal Santos Medical Center

AIM: To determine angle closure agreements between gonioscopy and anterior segment optical coherence tomography(AS-OCT), as well as gonioscopy and spectral domain OCT(SD-OCT). A secondary objective was to quantify inter-observer agreements of AS-OCT and SD-OCT ***: Seventeen consecutive subjects(33 eyes)were recruited from the study hospital’s Glaucoma *** was performed by a glaucomatologist masked to OCT results. OCT images were read independently by 2 other glaucomatologists masked to gonioscopy findings as well as each other’s analyses of OCT ***: Totally 84.8% and 45.5% of scleral spurs were visualized in AS-OCT and SD-OCT images respectively(P ying other angle landmarks in SD-OCT images will allow more consistent angle closure assessments. Gonioscopy and OCT imaging do not always agree in angle closure assessments but have their own advantages, and should be used together and not exclusively.

关键词： anterior segment imaging spectral domain imaging angle closure assessment

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Effects of primary glaucoma on sleep quality and daytime sleepiness of patients residing at an equatorial latitude

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International Journal of Ophthalmology(English edition) 2020年第9期13卷 1451-1458页

作者： Jacob YH Chin Zhi Hong Toh ying Tai Lo Hannah TY Wang elizabeth YW poh Chun Hau Chua Owen Kim Hee Boon Ang Lim Vernon KY Yong Augustinus Laude Hon Tym wong Leonard WL Yip Department of Ophthalmology National Healthcare Group Eye InstituteTan Tock Seng Hospital308433Singapore Monash School of Medicine Monash UniversityVictoria 3800Australia

AIM:To investigate the impact of primary glaucoma on sleep quality and daytime sleepiness of ***:Prospective cross-sectional study with consecutive sampling in South-East Asian population was *** questionnaires:the Pittsburg Sleep Quality Index(PSQI)and Epworth Sleepiness Scale(ESS)were administered *** with nonglaucomatous optic neuropathy or concomitant retinal pathology were *** severity was based on HVF 24-2 *** single vision was represented based on the better *** of and predictive factors for poor sleep quality and excessive daytime sleepiness were ***:A total of 79 primary open angle glaucoma(POAG),27 primary angle-closure glaucoma(PACG)patients,and 89 controls were *** patients had higher median PSQI scores(P=0.004)and poorer sleep quality(P<0.001).Compared to controls,PACG patients were 3.34 times more likely to have poor sleep quality(P=0.008),which remained significant after adjustment for demographics(P=0.016)and predictive variables(P=0.013).PACG patients have poorer sleep quality when visual acuity(VA)was 6/15 or worse(P=0.009).Univariate and multivariate analysis of predictive variables for poor sleep quality and daytime sleepiness did not find statistical ***:PACG patients have poorer sleep quality but not daytime *** is important in South-East Asian population with heavy disease *** on sleep disturbances can be considered to provide more ho istic care.

关键词： sleep disturbances primary glaucoma intrinsically photosensitive retinal ganglion cells daytime sleepiness sleep quality South-East Asia

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