scholarly journals The optical coherence tomography angiography manifestation of strabismus amblyopia with eccentric fixation

2020 ◽  
Author(s):  
Hongxing Ren ◽  
Jing Cheng ◽  
Aijiao Qin ◽  
Minghua Shi
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence Tomography Angiography ◽  
Retinal Thickness ◽  
Control Group ◽  
Optical Coherence ◽  
Deviation Angle ◽  
Vascular Plexus ◽  
Eccentric Fixation ◽  
Fixation Distance ◽  
Experimental Group

Abstract BackgroundTo explore the application value of optical coherence tomography angiography (OCTA) in patients with strabismus amblyopia accompanied by eccentric fixation.MethodsThe following data were collected from patients with strabismus amblyopia accompanied by eccentric fixation: best corrected visual acuity (BCVA); spherical equivalent (SE) and deviation angle; eccentric fixation distance using OCTA system software tools, with µm as the unit of measurement of the distance between the retinal fixed point and the macular fovea; macular fovea vessel length density (VLD); perfusion density (PD); foveal avascular zone (FAZ) area; and perimeter and circularity of the superficial retinal vascular plexus. The entry criteria were as follows: OCTA scanning quality and signal strength of 8 or above (range 0 to 10).ResultsData from a total of 34 patients were collected: 17 patients with strabismus amblyopia with eccentric fixation were included in the experimental group, and 17 patients without strabismus with central fixation were included in the control group. The average deviation angle of the experimental group was 26.71 ± 25.88 prism dioptres (PD), the amblyopic eye BCVA was 0.24 ± 0.22, the SE was 4.35 ± 2.98 D, the stereoscopic median was 800", the eccentric fixation distance was 632.18 ± 310.62 µm, the macular fovea retinal thickness was 207.82 ± 17.79 µm, the VLD of the superficial retinal vascular plexus was 7.31 ± 3.84 mm− 1, the PD was 0.16 ± 0.08, the FAZ area was 0.28 ± 0.17 mm2, the FAZ perimeter was 2.05 ± 0.56 mm, and the FAZ circularity was 0.67 ± 0.06. These results showed statistically significant differences in the SE and BCVA compared with the lateral eye and the control group, but there were no statistically significant differences in the macular fovea retinal thickness, VLD, PD, or FAZ. The eccentric fixation of amblyopic eyes was directly related to the deviation angle, and the regression formula was as follows: the eccentric fixation distance of amblyopic eyes = 8.319 × the deviation angle + 410.002 (F = 13.878, P = 0.002 < 0.01).ConclusionThe eccentric fixation distance of strabismus amblyopia with eccentric fixation is related to the deviation angle; the greater the deviation angle is, the greater the distance of eccentric fixation.Trial registrationChinese Clinical Trial Registry, ChiCTR1900022830. Registered 27 April 2019, http://www.chictr.org.cn/

scholarly journals Macular Structure and Microvasculature Changes in AIDS-Related Cytomegalovirus Retinitis Using Optical Coherence Tomography Angiography

2021 ◽  
Vol 8 ◽  
Author(s):  
Kui-Fang Du ◽  
Xiao-Jie Huang ◽  
Chao Chen ◽  
Wen-Jun Kong ◽  
Lian-Yong Xie ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Choroidal Thickness ◽  
Optical Coherence Tomography Angiography ◽  
Retinal Thickness ◽  
Signal Strength ◽  
Cytomegalovirus Retinitis ◽  
Foveal Avascular Zone ◽  
Control Group ◽  
Optical Coherence ◽  
Avascular Zone

Background: Cytomegalovirus retinitis (CMVR) is a crucial blind-causing disease of AIDS-related ocular opportunistic infection. The CMVR lesions produced retinal necrosis. It is not entirely clear whether CMVR eyes without macular-involved necrotic lesions may have subtle macular damage. In this study, we conducted a cross-sectional study using optical coherence tomography angiography (OCTA) to evaluate macular microvasculature and structure in eyes with AIDS-related CMVR.Methods: Acquired immune deficiency syndrome (AIDS)-related CMVR patients (active and inactive CMVR) and healthy controls treated in the Department of Ophthalmology, Beijing Youan Hospital, Capital Medical University between August 25, 2019, and October 18, 2019, were recruited. All OCTA parameters, including the foveal avascular zone (FAZ), retinal vessel density (VD), choroidal vascularity index (CVI), retinal thickness, and choroidal thickness, were compared between groups after the signal strength was corrected.Results: Signal strength in the 3 × 3 and 6 × 6 mm scan patterns was significantly weaker in the inactive CMVR group than in the control group (both p &lt; 0.001). After adjusting for signal strength, heterogeneity in the central fovea and parafoveal quadrants was present with a shift toward lower macular chorioretinal vasculature, decreased full choroidal thickness, and thicker retinal thickness in the active and inactive CMVR groups. The retinal nerve fiber layer (RNFL) and inner nuclear layer (INL) were significantly thicker in the active and inactive CMVR groups than in the control group (all p &lt; 0.05). For photoreceptor-retinal pigment epithelium (PR-RPE) thickness, no significant differences were found in any quadrant between groups. Foveal avascular zone areas were not significantly different among the three groups (p = 0.053).Conclusions: Subtle macular structure and microvasculature damage still existed in CMVR eyes without macular-involved necrotic lesions. The results of our study are helpful for a deep understanding of the damage caused by CMVR.

scholarly journals The role of quantitative deep capillary plexus in the pathogenesis of type 3 macular neovascularization: an optical coherence tomography angiography study

2021 ◽  
Author(s):  
Marina Concilio ◽  
Federica Fossataro ◽  
Daniela Montorio ◽  
Mariapaola Giordano ◽  
Gilda Cennamo
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence Tomography Angiography ◽  
Early Stage ◽  
Study Groups ◽  
Control Group ◽  
Main Role ◽  
Optical Coherence ◽  
Capillary Plexus ◽  
Type 3

Abstract Purpose To quantitatively investigate the role of deep capillary plexus (DCP) in patients affected by type 3 macular neovascularization (MNV), compared to patients with reticular pseudodrusen (RPD) eyes and healthy controls, using optical coherence tomography angiography (OCTA). Methods In this prospective observational study, a total of seventy-eight eyes of 78 patients were included. Group 1 consisted of 40 eyes of 40 patients with stage 1 of type 3 MNV (22 males, 18 females, mean age 73.7, SD ± 6.60) and group 2 included 38 eyes of 38 patients with RPD (17 males, 21 females, mean age 73.2, SD ± 4.55). The control group included 40 eyes of 40 healthy subjects (20 males, 20 females, mean age 71.4, SD ± 6.36 years). We evaluated the retinal vessel density (VD) of superficial capillary plexus (SCP) and deep capillary plexus (DCP) using OCTA. Results Patients with diagnosis of type 3 MNV showed statistically lower values of VD in DCP with respect to controls and to RPD group (p < 0.001), while there were no statistical differences between RPD and control group in macular region. No significant differences in VD of SCP were detected among the three study groups. Conclusion OCTA provides a reproducible, non-invasive detailed quantitative analysis of retinal vascular features and changing in early-stage type 3 MNV patients, which allowed to shed the light on the main role of DCP ischemia in the development of type 3 MNV.

Optical coherence tomography angiography in pseudophakic cystoid macular oedema compared to diabetic macular oedema: qualitative and quantitative evaluation of retinal vasculature

2018 ◽  
Vol 102 (12) ◽  
pp. 1684-1690 ◽  
Author(s):  
Riccardo Sacconi ◽  
Eleonora Corbelli ◽  
Adriano Carnevali ◽  
Stefano Mercuri ◽  
Alessandro Rabiolo ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Macular Oedema ◽  
Optical Coherence Tomography Angiography ◽  
Diabetic Macular Oedema ◽  
Foveal Avascular Zone ◽  
Cystoid Macular Oedema ◽  
Control Group ◽  
Retinal Vasculature ◽  
Ophthalmological Examination ◽  
Optical Coherence

AimsTo describe optical coherence tomography angiography (OCT-A) abnormalities of patients with pseudophakic cystoid macular oedema (PCMO) before and after pharmacological resolution, compared with diabetic macular oedema (DMO) and normal eyes.MethodsIn this retrospective, observational study, 44 eyes (30 patients) were included: 15 eyes (15 patients) affected by PCMO; 14 healthy fellow eyes used as negative control group; 15 eyes (15 age-matched and sex-matched patients) with DMO used as positive control group. All patients underwent a complete ophthalmological examination at baseline, including OCT-A scans of the macula through AngioPlex CIRRUS-5000 (Carl Zeiss Meditec, Dublin, USA). Patients with PCMO and DMO were re-evaluated after the pharmacological resolution of cystoid macular oedema (CMO).ResultsDisruption of parafoveal capillary arcade and cystoid spaces in deep capillary plexus (DCP) were frequent in patients with PCMO and DMO (73% and 100%, 87% and 100%). Capillary abnormalities and non-perfusion greyish areas in DCP were more frequent in DMO (P<0.001 and P=0.014). Patients with PCMO showed a larger foveal avascular zone area in DCP at baseline (P<0.001), which significantly reduced after treatment (P=0.001). Vessel density of full-thickness retina and DCP was reduced in patients with PCMO (P=0.022 and P=0.001), and no changes were observed after treatment. Interestingly, DCP appeared less represented in patients with DMO than PCMO subjects (P=0.001).ConclusionsPatients with PCMO have an impairment of mainly DCP, partially reversible after treatment. Furthermore, we disclosed that different alterations of the retinal vasculature characterise CMO derived from two different diseases, namely PCMO and DMO, and this could be due to their distinct pathophysiology.

scholarly journals Peripapillary microvasculature in patients with diabetes mellitus: An optical coherence tomography angiography study

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yong-Il Shin ◽  
Ki Yup Nam ◽  
Seong Eun Lee ◽  
Min-Woo Lee ◽  
Hyung-Bin Lim ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Optical Coherence Tomography ◽  
Optical Coherence Tomography Angiography ◽  
Plexiform Layer ◽  
Control Group ◽  
Diabetic Patients ◽  
Inner Plexiform Layer ◽  
Optical Coherence ◽  
Regression Analyses ◽  
Fiber Layer

Abstract To evaluate changes in peripapillary microvascular parameters in diabetes mellitus (DM) patients using optical coherence tomography angiography (OCTA). Seventy-one diabetic patients (40 in the no diabetic retinopathy [DR] group and 31 in the non-proliferative DR [NPDR] group) and 50 control subjects. OCTA (Zeiss HD-OCT 5000 with AngioPlex) 6 × 6 mm scans centered on the optic disc were analyzed. Peripapillary vessel density (VD), perfusion density (PD) in superficial capillary plexus (SCP) were automatically calculated. The average macular ganglion cell-inner plexiform layer (mGC-IPL) and peripapillary retinal nerve fiber layer (pRNFL) thicknesses of the no DR and NPDR groups were significantly thinner than those of the control group. The no DR and NPDR groups showed lower peripapillary VD and PD in SCP compared with the control group. Using univariate regression analyses, the average mGC-IPL thickness, the pRNFL thickness, the no DR group and NPDR group were significant factors that affected the peripapillary VD and PD in SCP. Multivariate regression analyses showed that the grade of DR was a significant factor affecting the peripapillary VD and PD in SCP. OCTA revealed that peripapillary microvascular parameters in the no DR and NPDR groups were lower than those of normal controls. The peripapillary VD and PD in SCP were correlated with the mGC-IPL thickness, the pRNFL thickness, and the no DR and NPDR groups. Changes in peripapillary OCTA parameters may help with understanding the pathophysiology of DM and evaluating a potentially valuable biomarker for patients with subclinical DR.

scholarly journals Evaluation of the Foveal Avascular Zone in Familial Exudative Vitreoretinopathy Using Optical Coherence Tomography Angiography

2020 ◽  
Author(s):  
Tetsuya Hasegawa ◽  
Misaki Hirato ◽  
Chieko Kobashi ◽  
Aya Yamaguchi ◽  
Rina Takagi ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Retinal Thickness ◽  
Deep Layer ◽  
Retinal Vessel ◽  
Foveal Avascular Zone ◽  
Control Group ◽  
Optical Coherence ◽  
Familial Exudative Vitreoretinopathy ◽  
Avascular Zone ◽  
Retinal Vessel Density

Abstract Background: To evaluate the foveal avascular zone (FAZ) and retinal structure in familial exudative vitreoretinopathy (FEVR).Methods: Twenty FEVR eyes with stage 1 or 2 disease and 20 control eyes were evaluated. The central retinal thickness (CRT), inner retinal thickness (IRT), surface retinal vessel density (SRVD), and deep retinal vessel density (DRVD) were measured using optical coherence tomography. The FAZ area was calculated using ImageJ software. The equivalent spherical value (SE) and axial length (AL) were measured. Results: The CRT (232±26.75 vs. 213.15 ± 16.138 μm; p=0.0003) and IRT (17.44±13.28 vs. 1.85 ± 5.696 μm; p=0.0005) were thicker in the FEVR group than in the control group. The surface FAZ area (0.26±0.1 vs. 0.33 ± 0.1 mm2; p=0.006) and the deep FAZ area (0.36±0.1 vs. 0.43 ± 0.1 mm2; p=0.037) were smaller in the FEVR group than in the control group. The SRVD values did not differ among the sectors, but the DRVD was higher in the FEVR group except for the inferior sector (superior, p=0.02; inferior, p=0.4; temporal, p=0.001; nasal, p=0.02). The SE and AL did not differ between the two groups. There was no correlation between the surface and deep layer FAZ area and age, CRT, SE, and AL. The surface, deep FAZ area, and IRT were correlated negatively (surface, r = −0.57, p=0.008; deep layer FAZ area, r = −0.5, p=0.02).Conclusion: Eyes with FEVR has a smaller FAZ because the inner retina with the vascular structure remained in the fovea.

scholarly journals Vessel Density and Retinal Thickness from Optical Coherence Tomography Angiography as New Indexes in Adolescent Myopia

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Qin Zhu ◽  
Chunwen Chen ◽  
Jingyan Yao
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence Tomography Angiography ◽  
Retinal Thickness ◽  
Blood Perfusion ◽  
Cross Sectional Study ◽  
Vessel Density ◽  
Optical Coherence ◽  
Cross Sectional ◽  
Foveal Region ◽  
Almost All

Purpose. To evaluate and quantify blood perfusion and retinal thickness (RT) from the perspective of quadrants by optical coherence tomography angiography (OCTA) in adolescents with myopia and explore the relationship between axial elongation and related indexes of OCTA. Methods. A total of 88 subjects (149 eyes) with different degrees of myopia were included in this cross-sectional study. Vessel density (VD) and RT of quadrants in macular and peripheral regions were measured through OCTA. Results. The superficial VD (SVD) of the parainferior region was significantly correlated with axial length (AL) between the emmetropia (EM) group and high myopia (HI) group ( P = 0.012 ). There were significant differences in deep VD (DVD) in all quadrants, except for the foveal, perifoveal, and peri-inferior regions ( P > 0.05 ). However, there were significant alterations in the whole, parainferior, and perinasal regions ( P = 0.030 , 0.023, and 0.035) in the low-to-moderate myopia (L–M) group compared with those in the HI group. There were significant differences in the RT in all quadrants, except for the foveal, paratemporal, and paranasal regions ( P > 0.05 ) between the EM and L–M groups and the foveal region ( P > 0.05 ) between the EM and HI groups. Nevertheless, only RT in the peri-inferior region of the L–M and HI groups showed significant differences. AL was negatively correlated with SVD in the perifoveal and parainferior regions (r = −0.179, P = 0.029 ; r = −0.227, P = 0.005 ) and inversely correlated with DVD and RT in almost all quadrants, except for the foveal region (r = −0.020, P = 0.811 ; r = 0.135, P = 1.000 ). Conclusion. DVD and RT were closely associated with the severity of myopia and might be new indexes in assessing and detecting myopia development via OCTA.

scholarly journals Assessment of the microvasculature in poppers maculopathy

2021 ◽  
Author(s):  
T. Hamann ◽  
M. R. J. Wiest ◽  
M. Brinkmann ◽  
M. Toro ◽  
K. Fasler ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Foveal Avascular Zone ◽  
Control Group ◽  
Optical Coherence ◽  
Vascular Plexus ◽  
Microvascular Changes ◽  
Lesion Type ◽  
Avascular Zone ◽  
Capillary Plexus ◽  
Healthy Control

Abstract Purpose To investigate a possible microvascular component of poppers maculopathy (PMP) using optical coherence tomography angiography (OCTA). Methods Twelve patients suffering from poppers maculopathy were included. Health records, optical coherence tomography (OCT), and OCTA data was gathered and compared to a healthy control group (HC). PMP lesion type was determined by manifestation in OCT. OCTA-based evaluation of retinal vascular plexus and choriocapillaris (CC) was executed. Vessel density (VD) and vessel length density (VLD) in superficial and deep capillary plexus (SCP, DCP), as well as flow deficits (FD), within the foveal avascular zone (FAZ) in CC were assessed. Results Median age of PMP patients was 40 (min 24; max 64) years, all male. Eleven patients presented with ellipsoid zone-type lesions; one patient showed a vitelliform-type lesion. No qualitative microvascular changes between PMP patients and HC were identified. Quantitative values for VD and VLD of SCP and DCP did not differ in between the two groups. The analysis of FDs in CC showed no deviation from PMP patients to HC. Conclusions No vascular anomalies in qualitative and quantitative analysis in OCTA were detected in PMP patients. The constitution of the CC within FAZ of PMP patients does not differ from HC when assessed as FD.

ALTERED RETINAL PERFUSION IN PATIENTS WITH INACTIVE GRAVES OPHTHALMOPATHY USING OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY

2020 ◽  
Vol 26 (3) ◽  
pp. 312-317 ◽  
Author(s):  
Nataša Mihailovic ◽  
Larissa Lahme ◽  
Friederike Rosenberger ◽  
Michaela Hirscheider ◽  
Julia Termühlen ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence Tomography Angiography ◽  
Control Group ◽  
Clinical Activity ◽  
Study Group ◽  
Healthy Controls ◽  
Optical Coherence ◽  
Clinical Activity Score ◽  
Graves Ophthalmopathy ◽  
Radial Peripapillary Capillary

Objective: The aim of this study was to evaluate retinal and optic nerve head (ONH) perfusion in patients with inactive Graves ophthalmopathy (GO) and compare it to healthy controls using optical coherence tomography angiography (OCTA). Methods: Twenty-nine eyes of 29 patients with inactive GO (study group) and 29 eyes of 29 healthy subjects (control group) were included in this study. The vessel density (VD) data in the superficial and deep retinal OCT angiogram of the macula and the radial peripapillary capillary network (RPC) were extracted and analyzed. OCTA was performed using RTVue XR Avanti with AngioVue (Optovue Inc, Fremont, CA). Clinical activity was evaluated using the clinical activity score, the severity assessment using the NOSPECS classification. Results: The VD in the superficial OCT angiogram and in the OCT angiogram of the ONH was significantly lower in the GO group when compared to the control group (whole en face, P = .016; parafovea, P = .026; RPC peripapillary, P = .027). There was no significant correlation between VD and functional parameters or the NOSPECS classification. Conclusion: Macular VD and ONH capillary density measured using OCTA were significantly lower in the study group compared to healthy controls. Noninvasive quantitative analysis of retinal perfusion using OCTA could be useful in monitoring patients with GO. Abbreviations: CAS = clinical activity score; GO = Graves ophthalmopathy; OCTA = optical coherence tomography angiography; ONH = optic nerve head; RPC = radial peripapillary capillary; rSp = Spearman's correlation coefficient; VD = vessel density

Swept-Source Optical Coherence Tomography Angiography in Vitreomacular Traction Syndrome

2021 ◽  
pp. 247412642110458
Author(s):  
Zofia Anna Nawrocka ◽  
Zofia Nawrocka ◽  
Jerzy Nawrocki
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Coherence Tomography Angiography ◽  
Retinal Thickness ◽  
Optical Coherence ◽  
Spontaneous Release ◽  
Swept Source ◽  
Avascular Zone ◽  
Group 3 ◽  
Group 2 ◽  
Group 1

Purpose: A swept-source optical coherence tomography angiography (SS-OCTA) analysis of vasculature in vitreomacular traction (VMT) before and after surgery as well as 15 months’ “watchful waiting” follow-up data. Methods: A retrospective analysis of 38 eyes. Patients were divided into group 1: untreated (20 eyes); group 2: untreated, spontaneous release of traction (4 eyes); and group 3: vitrectomy (14 eyes). Results: In all cases, SS-OCTA of the choriocapillaris revealed a hyporeflective area, which disappeared after traction release. In group 1, none of the analyzed factors significantly changed. In group 2, visual acuity (VA) improved from 0.3 logMAR to 0.1 logMAR. None of the following parameters significantly changed: central choroidal thickness, superficial fovea avascular zone (sFAZ), deep fovea avascular zone (dFAZ), and vessel densities. In 1 eye a lamellar macular hole formed. Factors increasing the chances of spontaneous release of traction were width of traction and central retinal thickness ( P < .05). In group 3, VA improved from 0.27 Snellen (0.6 logMAR) to 0.44 Snellen (0.4 logMAR) ( P < .05). Postoperative OCTA revealed significant decreases in central retinal thickness ( P < .001), the parameters sFAZ, and dFAZ ( P < .05). Conclusions: sFAZ and dFAZ decreased after vitrectomy but not after spontaneous release of traction. VA was better in eyes with spontaneous release of traction. The degree of improvement in VA was greater in the vitrectomy group. In all cases a hyporeflective area is visible in the choriocapillaris layer in SS-OCTA. It disappears when traction is released. Early treatment, at least in patients with lower VA, might be beneficial.

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