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Effect of femtosecond laser-assisted lens surgery on the optic nerve head and the macula

International Journal of Ophthalmology(English edition) 2019年第6期12卷 961-966页

作者： Josefina Renones de Abajo Beatriz Estévez Jorge Jesús María González Martín Humberto Carreras Díaz Juan Francisco Loro Ferrer Alfonso Antón López Eurocanarias Oftalmológica Las Palmas de Gran Canaria 35004Spain Universidad de Las Palmas de Gran Canaria(ULPGC) Las Palmas de Gran Canaria 35001Spain Department of Research Hospital Universitario de Gran Canaria Doctor NegrínLas Palmas de Gran Canaria 35019Spain Universidad Internacional de Cataluna(UIC) Barcelona 08195Spain Institut Catalàde Retina(ICR) Barcelona 08017Spain Parc de salut Mar Barcelona 08024Spain

AIM: To evaluate the effect of femtosecond laser-assisted lens surgery(FLALS;cataract surgery or refractive lens exchange) on the structure of the optic nerve head and the ***: This prospective longitudinal study included healthy eyes undergoing FLALS. Eyes with glaucoma or any other ocular disease that could alter optical coherence tomography results were excluded. Retinal nerve fiber layer(RNFL), Bruch’s membrane opening-minimum rim width(BMO-MRW) and macular thickness(MT) were measured preoperatively, 1 and 6 mo after surgery using spectral-domain optical coherence tomography(SD-OCT). Changes between preoperative and postoperative values were ***: A total of 87 eyes of 46 patients were included in this study. Preoperative RNFL, BMO-MRW and MT in microns(μm) were 100.77±10.39, 330.31±49.99 and 276.30±33.39, respectively. Postoperative RNFL, BMO-MRW and MT were 104.74±11.55, 348.32±54.05 and 279.83±22.65 1 mo after surgery and 102.93±11.17, 343.11±53.4 and 278.90±22.19 6 mo after surgery, respectively;which equals an increase of 3.93%, 5.45% and 1.27%,respectively, 1 mo after surgery, and 2.14%, 3.87% and 0.94% 6 mo after surgery. The differences between the preoperative and the postoperative RNFL and BMO-MRW values were statistically significant(Poptic nerve head in healthy eyes, assessed by SD-OCT. There is a slight increase in the values of RNFL, BMO-MRW and MT 1 mo and 6 mo after surgery.

关键词： femtosecond laser-assisted cataract surgery refractive lens exchange optical coherence tomography optic nerve head macula

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Changes of optic nerve head microcirculation in high myopia

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International Journal of Ophthalmology(English edition) 2023年第1期16卷 102-107页

作者： Wen-Quan Tang Yu-Lin Luo Xi-Lang Wang Xuan-Chu Duan Department of Ophthalmology Hunan Children’s HospitalChangsha 410007Hunan ProvinceChina Changsha Aier Eye Hospital Changsha 410011Hunan ProvinceChina Aier School of Ophthalmology Central South UniversityChangsha 410011Hunan ProvinceChina

AIM:To analyze the correlation of age,spherical equivalent(SE),and axial length(AL)with the microcirculation of optic nerve head(ONH)in high myopia(HM).METHODS:In this cross-sectional clinical study,164 right eyes were *** coherence tomography angiography(OCTA)was used to detect ONH vessel *** were classified based on age,SE,and *** of Age1,Age2,and Age3 were denoted for age classification(Age10.05)and the SE1,SE2,and SE3 groups(all P>0.05).No significant difference was observed in the intrapapillary vascular density(IVD)among AL1,AL2,AL3,and AL4 groups(P>0.05).However,a significant decrease was found in the peripapillary vascular density(PVD)in the AL1,AL2,AL3,and AL4 groups(F=3.605,P=0.015),especially in the inferotemporal(IT;F=6.25,P0.05).The PVD was correlated with AL(r=-0.236,P0.05).CONCLUSION:With the increase of AL,the IVD remains stable while the PVD decreases,especially in the three directions of temporal(IT,TI,and TS).The main cause of microcirculation reduction may be related to AL elongation rather than an increase in age or SE.

关键词： high myopia optic nerve head optical coherence tomography angiography vascular density axial length

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Influence of corneal power on circumpapillary retinal nerve fiber layer and optic nerve head measurements by spectral-domain optical coherence tomography

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International Journal of Ophthalmology(English edition) 2017年第9期10卷 1385-1391页

作者： Kazunori Hirasawa Nobuyuki Shoji Department of Orthoptics and Visual Science School of Allied Health SciencesKitasato UniversitySagamiharaKanagawa 252-0373Japan Department of Ophthalmology School of medicineKitasato UniversitySagamiharaKanagawa 252-0373Japan

AIM：To evaluate the influence of corneal power on circumpapillary retinal nerve fiber layer（cp RNFL）and optic nerve head（ONH）measurements by spectral-domain optical coherence tomography（SD-OCT）.METHODS：Twenty-five eyes of 25 healthy participants（mean age 23.6±3.6y）were imaged by SD-OCT using horizontal raster *** soft contact lenses of different powers（from-11 to＋5 diopters including 0diopter）were worn to induce 2-diopter changes in corneal *** in the cp RNFL and ONH measurements per diopter of change in corneal power were ***：As corneal power increased by 1 diopter,total and quadrant cp RNFL thicknesses,except for the nasal sector,decreased by-0.19 to-0.32μm（P〈0.01）.Furthermore,the disc,cup,and rim areas decreased by-0.017,-0.007,and-0.015 mm2,respectively（P〈0.001）;the cup and rim volumes decreased by-0.0013 and-0.006 mm3,respectively（P〈0.01）;and the vertical and horizontal disc diameters decreased by-0.006 and-0.007 mm,respectively（P〈0.001）.CONCLUSION：For more precise OCT imaging,the ocular magnification should be corrected by considering both the axial length and corneal ***,the effect of corneal power changes on cp RNFL thickness and ONH topography are small when compare with those of the axial length.

关键词： optical coherence tomography ocularmagnification corneal power circumpapillary retinal nervefiber layer optic nerve head

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Correlations between corneal and optic nerve head variables in healthy subjects and patients with primary open angle glaucoma

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International Journal of Ophthalmology(English edition) 2015年第6期8卷 1156-1161页

作者： Federico Saenz-Frances Luis Janez Lara Borrego-Sanz Clara Berrozpe-Villabona Jose Maria Martinez-de-la-Casa Laura Morales-Fernandez Julian Garcia-Sanchez Enrique Santos-Bueso Julian Garcia-Feijoo Department of Ophthalmology Clinico San Carlos HospitalComplutense University of Madrid Technology of Knowledge Institute Complutense University of Madrid

AIMTo correlate corneal variables (determined using the Pentacam) with optic nerve head (ONH) variables determined using the Heidelberg retina tomograph (HRT) in healthy subjects and patients diagnosed with primary open angle glaucoma (POAG).METHODSMeasurements were made in 75 healthy eyes and 73 eyes with POAG and correlations examined through Pearson correlation coefficients between the two sets of variables in the two subject groups. The corneal variables determined were corneal volume (CVol), central corneal thickness (CCT), overall corneal thickness (OvCT), the mean thickness of a circular zone centered at the corneal apex of 1 mm radius (zone I) and the mean thickness of several concentric rings, also centered at the apex until the limbus, each of 1 mm width (zones II to VI respectively). The ONH variables were determined using the *** following pairs of variables were correlated in the control group: CCT-disc area (DAr) (-0.48; Poptic disc area. In contrast, the POAG patients showed significant negative correlation between central and paracentral corneal thickness and the cup-disc ratio and CSM, and positive correlation between peripheral corneal thickness and HVC.

关键词： glaucoma optic nerve head corneal thickness

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Spectral domain optical coherence tomography crosssectional image of optic nerve head during intraocular pressure elevation

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International Journal of Ophthalmology(English edition) 2014年第6期7卷 1022-1029页

作者： Ji Young Lee You Kyung Lee Jung Il Moon Myoung Hee Park Department of Ophthalmology Yeouido St. Mary's HospitalCollege of Medicinethe Catholic University of Korea62Yeuido-dongYoungdeungpo-guSeoul 150-713Korea

AIM: To analyze changes of the optic nerve head(ONH) and peripapillary region during intraocular pressure(IOP) elevation in patients using spectral domain optical coherence tomography(SD-OCT).METHODS: Both an optic disc 200×200 cube scan and a high-definition 5-line raster scan were obtained from open angle glaucoma patients presented with monocular elevation of IOP(≥30 mm Hg) using SD-OCT. Additional baseline characteristics included age, gender, diagnosis,best-corrected visual acuity, refractive error, findings of slit lamp biomicroscopy, findings of dilated stereoscopic examination of the ONH and fundus, IOP, pachymetry findings, and the results of visual ***: The 24 patients were selected and divided into two groups: group 1 patients had no history of IOP elevation or glaucoma(n =14), and group 2 patients did have history of IOP elevation or glaucoma(n =10). In each patient, the study eye with elevated IOP was classified into group H(high), and the fellow eye was classified into group L(low). The mean deviation(MD)differed significantly between groups H and L when all eyes were considered(P =0.047) and in group 2(P =0.042), not in group 1(P =0.893). Retinal nerve fiber layer(RNFL) average thickness(P =0.050), rim area(P =0.015),vertical cup/disc ratio(P =0.011), cup volume(P =0.028),inferior quadrant RNFL thickness(P =0.017), and clockhour(1, 5, and 6) RNFL thicknesses(P =0.050, 0.012, and0.018, respectively), cup depth(P =0.008), central prelaminar layer thickness(P =0.023), mid-inferior prelaminar layer thickness(P =0.023), and nasal retinal slope(P =0.034)were significantly different between the eyes with groups H and ***:RNFLaveragethickness,rim area,vertical cup/disc ratio, cup volume, inferior quadrant RNFL thickness, and clock-hour(1, 5, and 6) RNFL thicknesses significantly changed during acute IOP elevation.

关键词： spectral domain optical coherence tomography optic nerve head elevated intraocular pressure open angle glaucoma retinal nerve fiver layer

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Repeatability,interocular correlation and agreement of optic nerve head vessel density in healthy eyes:a sweptsource optical coherence tomographic angiography study

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International Journal of Ophthalmology(English edition) 2024年第5期17卷 896-903页

作者： Dan-Qi Fang Da-Wei Yang Xiao-Ting Mai Carol Y Cheung Hao-Yu Chen Joint Shantou International Eye Center Shantou University&the Chinese University of Hong KongShantou 515041Guangdong ProvinceChina Department of Ophthalmology and Visual Sciences Chinese University of Hong KongHong Kong 999077China

AIM:To assess the repeatability,interocular correlation,and agreement of quantitative swept-source optical coherence tomography angiography(OCTA)optic nerve head(ONH)parameters in healthy ***:Thir ty-three healthy subjects were *** ONH of both eyes were imaged four times by a swept-source-OCTA using a 3 mm×3 mm scanning *** of the radial peripapillary capillary were analyzed by a customized Matlab program,and the vessel density,fractal dimension,and vessel diameter index were *** repeatability of the four scans was determined by the intraclass correlation coefficient(ICC).The most well-centered optic disc from the four repeated scans was then selected for the interocular correlation and agreement analysis using the Pearson correlation coefficient,ICC and Bland-Altman ***:All swept-source-OCTA ONH parameters exhibited certain repeatability,with ICC>0.760 and coefficient of variation(CoV)≤7.301%.The obvious interocular correlation was observed for papillary vessel density(ICC=0.857),vessel diameter index(ICC=0.857)and fractal dimension(ICC=0.906),while circumpapillary vessel density exhibited moderate interocular correlation(ICC=0.687).Bland-Altman plots revealed an agreement range of-5.26%to 6.21%for circumpapillary vessel ***:OCTA ONH parameters demonstrate good repeatability in healthy *** interocular correlations of papillary vessel density,fractal dimension and vessel diameter index are high,but the correlation for circumpapillary vessel density is moderate.

关键词： interocular correlation repeatability optic nerve head optical coherence tomography angiography vessel density

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Evaluation of optic nerve head vessels density changes after phacoemulsification cataract surgery using optical coherence tomography angiography

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International Journal of Ophthalmology(English edition) 2023年第6期16卷 884-890页

作者： Ze-Hui Zhu Yin-Ying Zhao Rui Zou Han Zou Jia-Yan Fang Ping-Jun Chang Yun-E Zhao Eye Hospital and School of Ophthalmology and Optometry Wenzhou Medical UniversityWenzhou 325000Zhejiang ProvinceChina National Clinical Research Center for Ocular Diseases Wenzhou 325000Zhejiang ProvinceChina Eye Hospital of Wenzhou Medical University Hangzhou Branch Hangzhou 310000Zhejiang ProvinceChina

·AIM:To evaluate optic nerve head(ONH)vessel density(VD)changes after cataract surgery using optical coherence tomography angiography(OCTA).·METHODS:This was a prospective observational ***-four eyes with mild/moderate cataracts were *** scans were obtained before and 3mo after cataract surgery using *** peripapillary capillary(RPC)density,all VD,large VD and retinal nerve fiber layer thickness(RNFLT)in total disc,inside disc,and different peripapillary sectors were assessed and *** quality score(QS),fundus photography grading and bestcorrected visual acuity(BCVA)were also collected,and correlation analyses were performed between VD change and these parameters.·RESULTS:Compared with baseline,both RPC and all VD increased in inside disc area 3mo postoperatively(from 47.5%±5.3%to 50.2%±3.7%,and from 57.87%±4.30%to 60.47%±3.10%,all P<0.001),but no differences were observed in peripapillary ***,large VD increased from 5.63%±0.77%to 6.47%±0.72%in peripapillary ONH region(P<0.001).RPC decreased in inferior and superior peripapillary ONH parts(P=0.019,<0.001 respectively).There were obvious negative correlations between RPC change and large VD change in inside disc,superior-hemi,and inferior-hemi(r=-0.419,-0.370,and-0.439,P=0.017,0.044,and 0.015,respectively).No correlations were found between VD change and other parameters including QS change,fundus photography grading,postoperative BCVA,and postoperative peripapillary RNFLT.·CONCLUSION:RPC density and all VD in the inside disc ONH region increase 3mo after surgery in patients with mild to moderate *** obvious VD changes are found in peripapillary area postoperatively.

关键词： phacoemulsification cataract optical coherence tomography angiography vessel density optic nerve head

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Intraretinal layer segmentation and parameter measurement in optic nerve head region through energy function of spatial-gradient continuity constraint

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Journal of Central South University 2018年第8期25卷 1938-1947页

作者： CHEN Zai-liang WEI Hao SHEN Hai-lan PENG Peng YUE Ke-juan LI Jian-feng ZOU Bei-ji School of Information Science and Engineering Central South University Joint Laboratory of Mobile Health Ministry of Education and China Mobile School of Information Science and Engineering Jishou University

For the diagnosis of glaucoma,optical coherence tomography(OCT)is a noninvasive imaging technique for the assessment of retinal *** accurately segment intraretinal layers in an optic nerve head(ONH)region,we proposed an automatic method for the segmentation of three intraretinal layers in eye OCT scans centered on *** internal limiting membrane,inner segment and outer segment,Bruch’s membrane surfaces under vascular shadows,and interaction of multiple high-reflectivity regions in the OCT image can be accurately segmented through this ***,we constructed a novel spatial-gradient continuity constraint,termed spatial-gradient continuity constraint,for the correction of discontinuity between adjacent image segmentation *** our experiment,we randomly selected 20 B-scans,each annotated three retinal layers by *** distance errors of?0.80μm obtained through this method are lower than those obtained through the state-of-art method(?1.43μm).Meanwhile,the segmentation results can be used as bases for the diagnosis of glaucoma.

关键词： surface segmentation parameter measurement optical coherence tomography optic nerve head spatial-gradient continuity constraints

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The in vivo 3D optic nerve head Modeling Based on Human Multimodality Images

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Chinese Journal of Biomedical Engineering(English Edition) 2012年第4期21卷 139-143页

作者： QIU Jian-feng QIAN Xiu-qing QUAN Hai-ying WANG Jun LIU Zhi-cheng School of Biomedical Engineering Capital Medical University Department of Radiology Taishan Medical College Department of Radiology The Fourth People's Hospital Shandong Taian

Introduction： The human optic nerve head （ONH） is vulnerable to the damage in glaucomatous high intraocular pressure （IOP）. In order to analyze the human ONH head stress and deformation in high IOP, an in vivo three-dimensional （3D） ONH model was reconstructed by optical coherence tomography （OCT） images and magnetic resonance imaging （MRI） images. Materials and Methods： A human eye was scanned by MRI and OCT in serial imaging protocol. The sclera and ONH were segmented from the images, and 3D models were reconstructed by multimodality image registration. Through the morphological segmentation, part of lamina cribrosa （LC） was acquired and reconstructed in combination with the ONH and sclera. Results： The models of ONH and sclera were got, the part of LC was included in the model. In the analysis of FEM, the ONH was compressed and the cup/disk ratio was changed obviously in high glaucomatous IOP. Discussion： This study described a method to build a 3D in vivo ONH model by image processing. It can be used in biomechanieal analysis, and provide the stress state of ONH for the research about the fundus damage of glaucoma.

关键词： glaucoma optic nerve head muhimodality image finite elementanalysis biomechanics

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Comparison of cross sectional optical coherence tomography images of elevated optic nerve heads across acquisition devices and scan protocols

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Eye and Vision 2018年第1期5卷 163-171页

作者： Megh D.Patel Fareshta Khushzad Heather E.Moss Department of Ophthalmology Stanford University2370 Watson Courtsuite 200Palo AltoCA 94303USA Department of Neurology and Neurological Sciences Stanford University2370 Watson Courtsuite 200Palo AltoCA 94303USA

Background:optic nerve head measurements extracted from optical coherence tomography(OCT)show promise for monitoring clinical conditions with elevated optic nerve *** aim of this study is to compare reliability within and between raters and between image acquisition devices of optic nerve measurements derived from OCT scans in eyes with varying degrees of optic nerve ***:Wide angle line scans and narrow angle radial scans through optic nerve heads were obtained using three spectral domain(SD)OCT devices on 5 subjects(6 swollen optic nerves,4 normal optic nerves).Three raters independently semi-manually segmented the internal limiting membrane(ILM)and Bruch’s membrane(BM)on each scan using customized *** rater segmented each scan *** were qualitatively and quantitatively ***-rater,intra-rater and inter-device reliability was assessed for the optic nerve cross sectional area calculated from the ILM and BM segmentations using intraclass correlation coefficients and graphical ***:Line scans from all devices were qualitatively *** scans for which frame rate could not be adjusted were of lower ***-rater reliability for segmentation and optic nerve cross sectional area was better than inter-rater reliability,which was better than inter-device reliability,though all ICC exceeded *** was not impacted by the degree of optic nerve ***:SD-OCT devices acquired similar quality scans of the optic nerve head,with choice of scan protocol affecting the *** image derived markers,variability between devices was greater than that attributable to inter and intra-rater differences.

关键词： optic nerve head optical coherence tomography Bruch’s membrane Inner limiting membrane Comparison

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