scholarly journals Analysis of Peripapillary Geometric Characters in High Myopia Using Swept-Source Optical Coherence Tomography

2016 ◽  
Vol 57 (1) ◽  
pp. 137 ◽  
Author(s):  
Tomoko Asai ◽  
Yasushi Ikuno ◽  
Masahiro Akiba ◽  
Tsutomu Kikawa ◽  
Shinichi Usui ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
High Myopia ◽  
Optical Coherence ◽  
Swept Source

scholarly journals Comparison between Widefield Optical Coherence Tomography Devices in Eyes with High Myopia

Diagnostics ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 658
Author(s):  
Federico Corvi ◽  
Federico Zicarelli ◽  
Matteo Airaldi ◽  
Salvatore Parrulli ◽  
Mariano Cozzi ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
High Myopia ◽  
Cross Sectional Study ◽  
Horizontal Line ◽  
Optical Coherence ◽  
Cross Sectional ◽  
Swept Source ◽  
Image Artifact ◽  
Control Subjects ◽  
And Control

Background: To compare four different optical coherence tomography (OCT) devices for visualization of retinal and subretinal layers in highly myopic eyes. Methods: In this prospective, observational, cross-sectional study, consecutive patients with high myopia and control subjects were imaged by four OCT devices: Spectralis OCT2, PlexElite 2.0 100 kHz, PlexElite 2.0 200 kHz and the Canon Xephilio OCT-S1. The acquisition protocol for comparison consisted of single vertical and horizontal line scans centered on the fovea. Comparison between the devices in the extent of visible retina, presence of conjugate image or mirror artifacts, visibility of the sclerochoroidal interface and retrobulbar tissue. Results: 30 eyes with high myopia and 30 control subjects were analyzed. The visualized RPE length was significantly different between the OCT devices with Xephilio OCT-S1 imaging the largest extent (p < 0.0001). The proportion of eyes with conjugate image artifact was significantly higher with the Spectralis OCT (p < 0.0001), and lower with the PlexElite 200 kHz (p < 0.0001). No difference in visibility of the sclerochoroidal interface was noted among instruments. The retrobulbar tissue was visible in a higher proportion of eyes using swept-source PlexElite 100 kHz and 200 kHz (p < 0.007) compared to the other devices. Conclusions: In highly myopic eyes, the four OCT devices demonstrated significant differences in the extent of the retina imaged, in the prevalence of conjugate image artifact, and in the visualization of the retrobulbar tissue.

scholarly journals Accuracy of a deep convolutional neural network in the detection of myopic macular diseases using swept-source optical coherence tomography

2019 ◽  
Author(s):  
Takahiro Sogawa ◽  
Hitoshi Tabuchi ◽  
Daisuke Nagasato ◽  
Hiroki Masumoto ◽  
Yasushi Ikuno ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Correct Answer ◽  
High Myopia ◽  
Binary Classification ◽  
Area Under The Curve ◽  
Optical Coherence ◽  
Swept Source ◽  
Study Results ◽  
Sensitivity Specificity

AbstractThis study examined and compared outcomes of deep learning (DL) in identifying swept-source optical coherence tomography (OCT) images without myopic macular lesions [i.e., no high myopia (nHM) vs. high myopia (HM)], and OCT images with myopic macular lesions [e.g., myopic choroidal neovascularization (mCNV) and retinoschisis (RS)]. A total of 796 SS-OCT images were included in the study as follows and analyzed by k-fold cross-validation (k = 5) using DL’s renowned model, Visual Geometry Group-16: nHM, 107 images; HM, 456 images; mCNV, 122 images; and RS, 111 images (n = 796). The binary classification of OCT images with or without myopic macular lesions; the binary classification of HM images and images with myopic macular lesions (i.e., mCNV and RS images); and the ternary classification of HM, mCNV, and RS images were examined. Additionally, sensitivity, specificity, and the area under the curve (AUC) for the binary classifications as well as the correct answer rate for ternary classification were examined.The classification results of OCT images with or without myopic macular lesions were as follows: AUC, 0.983; sensitivity, 0.953; specificity, 0.940. The classification results of HM images and images with myopic macular lesions were as follows: AUC, 0.976; sensitivity, 0.940; specificity, 0.941. The correct answer rate in the ternary classification of HM images, mCNV images, and RS images were as follows: HM images, 93.7%; mCNV images, 82.4%; and RS, 92.3% with mean, 91.4%. Using noninvasive, easy-to-obtain swept-source OCT images, the DL model was able to classify OCT images without myopic macular lesions and OCT images with myopic macular lesions such as mCNV and RS with high accuracy. The study results suggest the possibility of conducting highly accurate screening of ocular diseases using artificial intelligence, which may improve the prevention of blindness and reduce workloads for ophthalmologists.

Characteristics of Peripapillary Staphylomas Associated With High Myopia Determined by Swept-Source Optical Coherence Tomography

2016 ◽  
Vol 169 ◽  
pp. 138-144 ◽  
Author(s):  
Kosei Shinohara ◽  
Muka Moriyama ◽  
Noriaki Shimada ◽  
Takeshi Yoshida ◽  
Kyoko Ohno-Matsui
Keyword(s):  
Optical Coherence Tomography ◽  
High Myopia ◽  
Optical Coherence ◽  
Swept Source

Accuracy of intraocular lens calculation formulas using a swept-source optical coherence tomography biometer in high myopia

2021 ◽  
Author(s):  
Chi Zhang ◽  
Zi Ye ◽  
Wenqian Chen ◽  
Yi Gao ◽  
Tianju Ma ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Intraocular Lens ◽  
Axial Length ◽  
High Myopia ◽  
Absolute Error ◽  
Refractive Errors ◽  
Optical Coherence ◽  
Swept Source ◽  
The Mean ◽  
The Hill

Abstract Background: To compare the accuracy of intraocular lens (IOL) calculation formulas in cataract patients with high myopia using the measurements of a swept-source optical coherence tomography (SS-OCT) biometer, the IOLMaster700.Methods: Patients with axial length (AL) equal to or longer than 26.00mm undergoing uneventful cataract surgery were enrolled. Kane, Hill-RBF3.0, EVO, Barrett Universal II, Haigis, and SRK/T formulas were evaluated with the measurements taken by IOLMaster700. The manifest refraction was measured at one month postoperatively. After the mean refractive errors were zeroed out, the mean absolute error (MAE), the median absolute error (MedAE), the standard deviation of prediction error (SD), and the percentage of eyes with refractive errors within ±0.25, ±0.50, ±0.75, and ±1.00 diopter (D) were calculated. A subgroup analysis was based on the axial length.Results: 65 eyes of 65 patients were included. There were significant differences between the absolute refractive errors predicted by these formulas (P＜0.05), but no significant differences between the percentage of eyes within a certain range of refractive errors (P＞0.05). The Kane formula achieved the lowest MAE (0.323D), SD (0.402D), followed by EVO, Hill-RBF3.0, Barrett Universal II, Haigis, and SRK/T formulas. The Kane formula also had the highest percentage of eyes with refractive errors within ±0.50D (80.0%) and ±1.00D (98.5%). The Hill-RBF3.0 formula achieved the lowest MedAE (0.240D). In eyes with an AL ≥ 30.00mm, the Kane formula had the lowest MAE (0.358D).Conclusion: Newer formulas such as Kane, EVO, Hill-RBF3.0, and Barrett Universal II show the highest accuracy in refractive prediction in eyes with high myopia while using the measurements of IOLMaster700. In extremely myopic eyes with an AL ≥ 30.00mm, the Kane formula is the most accurate.

Vitreous Changes in High Myopia Observed by Swept-Source Optical Coherence Tomography

2014 ◽  
Vol 55 (3) ◽  
pp. 1447 ◽  
Author(s):  
Hirotaka Itakura ◽  
Shoji Kishi ◽  
Danjie Li ◽  
Keisuke Nitta ◽  
Hideo Akiyama
Keyword(s):  
Optical Coherence Tomography ◽  
High Myopia ◽  
Optical Coherence ◽  
Swept Source

Peripapillary Scleral Deformation and Retinal Nerve Fiber Damage in High Myopia Assessed With Swept-Source Optical Coherence Tomography

2013 ◽  
Vol 155 (5) ◽  
pp. 927-936.e1 ◽  
Author(s):  
Tadamichi Akagi ◽  
Masanori Hangai ◽  
Yugo Kimura ◽  
Hanako Ohashi Ikeda ◽  
Atsushi Nonaka ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Nerve Fiber ◽  
High Myopia ◽  
Optical Coherence ◽  
Swept Source ◽  
Fiber Damage ◽  
Retinal Nerve Fiber
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