Wide-Field Swept-Source Optical Coherence Tomography Analysis of Interocular Symmetry of Choroidal Thickness in Healthy Young Individuals

Background/aimsPathological myopia (PM) is a leading cause of blindness worldwide. We aimed to evaluate microvascular and chorioretinal changes in different stages of myopia with wide-field (WF) swept-source (SS) optical coherence tomography angiography (OCTA).MethodsThis prospective cross-sectional observational study included 186 eyes of 122 patients who had undergone imaging between November 2018 and October 2020. Vessel density (VD) and vessel skeletonised density (VSD) of superficial capillary plexus, deep capillary plexus and whole retina, as well as foveal avascular zone parameters, retinal thickness (RT) and choroidal thickness (CT), were calculated.ResultsThis study evaluated 75 eyes of 48 patients with high myopia (HM), 43 eyes of 31 patients with mild to moderate myopia and 68 eyes of 53 age-matched controls. Controlling for age and the presence of systemic hypertension, we found that HM was associated with decrease in VD and VSD in all layers on 12×12 mm² scans. Furthermore, HM was associated with a VD and VSD decrease in every Early Treatment Diabetic Retinopathy Study grid, with a larger decrease temporally (βVD=−0.39, βVSD=−10.25, p<0.01). HM was associated with decreased RT and CT. Reduction in RT was outside the macular region, while reduction in CT was in the macular region.ConclusionUsing WF SS-OCTA, we identified reduction in microvasculature and structural changes associated with myopia. Decrease in VD and VSD was greater in the temporal quadrant, and reductions in RT and CT were uneven across the retina. Further work may help identify risk factors for the progression of PM and associated vision-threatening complications.

Download Full-text

Automated macular choroidal thickness measurement by swept-source optical coherence tomography in pseudoxanthoma elasticum

International Journal of Retina and Vitreous ◽

10.1186/s40942-016-0040-0 ◽

2016 ◽

Vol 2 (1) ◽

Cited By ~ 5

Author(s):

Rosa Dolz-Marco ◽

María Andreu-Fenoll ◽

Pablo Hernández-Martínez ◽

M. Dolores Pinazo-Durán ◽

Roberto Gallego-Pinazo

Keyword(s):

Optical Coherence Tomography ◽

Choroidal Thickness ◽

Pseudoxanthoma Elasticum ◽

Thickness Measurement ◽

Optical Coherence ◽

Swept Source

Download Full-text

Assessment of Choroidal Thickness in Healthy and Glaucomatous Eyes Using Swept Source Optical Coherence Tomography

PLoS ONE ◽

10.1371/journal.pone.0109683 ◽

2014 ◽

Vol 9 (10) ◽

pp. e109683 ◽

Cited By ~ 34

Author(s):

Chunwei Zhang ◽

Andrew J. Tatham ◽

Felipe A. Medeiros ◽

Linda M. Zangwill ◽

Zhiyong Yang ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Choroidal Thickness ◽

Optical Coherence ◽

Swept Source

Download Full-text

Impact of image averaging on wide‐field choroidal thickness measurements using enhanced‐depth imaging optical coherence tomography

Clinical and Experimental Optometry ◽

10.1111/cxo.12855 ◽

2018 ◽

Vol 102 (3) ◽

pp. 320-326 ◽

Cited By ~ 4

Author(s):

Hosein Hoseini‐Yazdi ◽

Stephen J Vincent ◽

Michael J Collins ◽

Scott A Read ◽

David Alonso‐Caneiro

Keyword(s):

Optical Coherence Tomography ◽

Choroidal Thickness ◽

Enhanced Depth Imaging ◽

Wide Field ◽

Optical Coherence ◽

Depth Imaging ◽

Imaging Optical Coherence Tomography ◽

Image Averaging ◽

Thickness Measurements

Download Full-text

Subfoveal choroidal thickness measurements in spectral-domain and swept-source optical coherence tomography devices

Oman Journal of Ophthalmology ◽

10.4103/ojo.ojo_69_2018 ◽

2018 ◽

Vol 11 (3) ◽

pp. 306

Author(s):

IsaacW Chay ◽

LouisW Lim ◽

KaiXiong Cheong ◽

ColinS Tan

Keyword(s):

Optical Coherence Tomography ◽

Choroidal Thickness ◽

Spectral Domain ◽

Optical Coherence ◽

Swept Source ◽

Subfoveal Choroidal Thickness ◽

Thickness Measurements

Download Full-text

Interocular asymmetry of choroidal thickness and vascularity index measurements in normal eyes assessed by swept-source optical coherence tomography

Quantitative Imaging in Medicine and Surgery ◽

10.21037/qims-21-813 ◽

2021 ◽

Vol 0 (0) ◽

pp. 0-0

Author(s):

Jie Lu ◽

Hao Zhou ◽

Yingying Shi ◽

James Choe ◽

Mengxi Shen ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Choroidal Thickness ◽

Optical Coherence ◽

Swept Source

Download Full-text

Topographic Analysis of Short Posterior Ciliary Arteries Using Wide-Field Swept-Source En-Face Optical Coherence Tomography

10.21203/rs.3.rs-151008/v1 ◽

2021 ◽

Author(s):

Raphael Lejoyeux ◽

Raphael Atia ◽

Kiran Vupparaboina ◽

Mohamed Ibrahim ◽

Jose-Alain Sahel ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Posterior Pole ◽

Wide Field ◽

Temporal Part ◽

Optical Coherence ◽

Cross Sectional ◽

Swept Source ◽

Topographic Analysis ◽

En Face ◽

Ciliary Arteries

Abstract Purpose: To study the topographic distribution of the short posterior ciliary arteries (SPCA) entry sites into the choroid in normal eyes using structural en-face swept source optical coherence tomography (SS-OCT). Methods: Retrospective analysis of SS-OCT scans (wide-field structural SS-OCT 12x12mm) of 13 healthy subjects was performed. Cross-sectional swept-source OCT scans derived from a volume scan were represented as en-face image display following the Choroid-Scleral Interface to obtain en-face OCT. SPCAs in their last scleral location before choroidal entrance were identified manually, counted and localized by two masked observers. Correlations between two masked observers were analyzed using inter- and intra- class correlation. Results: Accuracy for the choroidal inner and outer border segmentation was 95-99%. Eighteen eyes from 13 normal subjects were included for SPCA analysis. The mean number of arteries was 13.8±3.5 per eye. Thirty-six percent were in the center of the posterior pole image; however, 21% were in the temporal part of the posterior pole. Median accuracy of the detection is 0.94. The correlation between the two observers was fair (0.54).Conclusion: Our algorithm allows visualization of the SPCA at the posterior pole of the eye using wide-field en-face SS-OCT. It can also help the clinicians to study the SPCAs in numerous ocular diseases, particularly its relationship with focal choroidal diseases.

Download Full-text

Wide-field optical coherence tomography deviation map for early glaucoma detection

British Journal of Ophthalmology ◽

10.1136/bjophthalmol-2021-319509 ◽

2021 ◽

pp. bjophthalmol-2021-319509

Author(s):

Hyungjun Kim ◽

Hae Min Park ◽

Hyo Chan Jeong ◽

So Yeon Moon ◽

Hyunsoo Cho ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Characteristic Curve ◽

Wide Field ◽

Optical Coherence ◽

Diagnostic Ability ◽

Swept Source ◽

Early Glaucoma ◽

Field Database ◽

The Individual ◽

Healthy Eyes

Background/aimsThis study aimed to establish a wide-field optical coherence tomography (OCT) deviation map obtained from swept-source OCT (SS-OCT) scans. Moreover, it also aimed to compare the diagnostic ability of this wide-field deviation map with that of the peripapillary and macular deviation maps currently being used for the detection of early glaucoma (EG).MethodsFour hundred eyes, including 200 healthy eyes and 200 eyes with EG were enrolled in this retrospective observational study. Patients underwent a comprehensive ocular examination, including wide-field SS-OCT (DRI-OCT Triton; Topcon, Tokyo, Japan). The individual wide-field scan was converted into a uniform template using the fovea and optic disc centres as fixed landmarks. Subsequently, the wide-field deviation map was obtained via the comparison between individual wide-field data and a normative wide-field database that had been created by combining images of healthy eyes into a uniform template in a previous study. The ability of the new wide-field deviation map to distinguish between EG and healthy eyes was assessed by comparing it with conventional deviation maps based on the area under the receiver operating characteristic curve (AUC).ResultsThe wide-field deviation map obtained using the normative wide-field database showed the highest diagnostic ability for the diagnosis of EG (AUC=0.980 and 961 for colour-coded pixels presenting <5% and <1%, respectively) among various deviation maps. Its AUC was significantly superior to that of most conventional deviation maps (p<0.05). The wide-field deviation map demonstrated early structural glaucomatous damage well over a wider area.ConclusionThe wide-field SS-OCT deviation map exhibited good performance for distinguishing between eyes with EG and healthy eyes. The visualisation of the wider damaged area on the wide-field deviation map could be useful for the diagnosis of EG in clinical settings.

Download Full-text

Choroidal changes in intermediate age-related macular degeneration patients with drusen or pseudodrusen

European Journal of Ophthalmology ◽

10.1177/1120672120914530 ◽

2020 ◽

pp. 112067212091453 ◽

Cited By ~ 1

Author(s):

Raffaella Rosa ◽

Paolo Corazza ◽

Maria Musolino ◽

Chiara Mochi ◽

Guido Maiello ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Macular Degeneration ◽

Choroidal Thickness ◽

Age Related Macular Degeneration ◽

Optical Coherence ◽

Flow Area ◽

Swept Source ◽

Reticular Pseudodrusen ◽

Vascular Flow ◽

Age Related

Reticular pseudodrusen are associated with a thinner choroid. The aim of our study was to determine the differences in central choroidal thickness and choriocapillaris vascular flow area between eyes with and without reticular pseudodrusen using swept-source optical coherence tomography and swept-source optical coherence tomography angiography. We conducted a retrospective case control study which included 27 eyes from 27 consecutive patients with intermediate age-related macular degeneration and 17 eyes from 17 healthy participants. Complete ophthalmic examinations were carried out including axial length measurements; fundus color retinography; fundus autofluorescence; swept-source optical coherence tomography and swept-source optical coherence tomography angiography; central choroidal thickness and choriocapillaris vascular flow area. Patients were classified as no reticular pseudodrusen, mild reticular pseudodrusen, and severe reticular pseudodrusen. Mean central choroidal thickness in patients exhibiting severe reticular pseudodrusen (110 ± 56 μm) was significantly smaller than in patients with no reticular pseudodrusen (201 ± 76 μm, p < 0.01). Mean choriocapillaris vascular flow area in severe reticular pseudodrusen patients (45.2% ± 3.0%) was also significantly less than in patients with no (47.9% ± 1.6%, p < 0.001) and mild reticular pseudodrusen (47.7% ± 1.0%, p < 0.05). Stepwise multiple regression models confirmed the association of reticular pseudodrusen with central choroidal thickness (p < 0.001) and choriocapillaris vascular flow area (p < 0.01) even after accounting for age, axial length, and refractive error. Soft drusen were not associated with changes in either central choroidal thickness (p = 0.13) nor choriocapillaris vascular flow area (p = 0.29). A significant, positive relationship was found between central choroidal thickness and choriocapillaris vascular flow area (r = 0.44, p = 0.01). Therefore, both central choroidal thickness and choriocapillaris vascular flow area are decreased in eyes with reticular pseudodrusen, as compared to healthy eyes and intermediate age-related macular degeneration eyes not exhibiting reticular pseudodrusen. In addition, central choroidal thickness and choriocapillaris vascular flow area are related, and the reduction of either is directly associated to the severity of reticular pseudodrusen. Further studies are needed to assess the clinical significance of these findings.

Download Full-text