scholarly journals Horizontal Extraocular Muscle Insertion Site in Relation to Axial Length Using Swept-Source Anterior Segment OCT

2020 ◽  
Vol Volume 14 ◽  
pp. 3583-3589
Author(s):  
Dina El-Fayoumi ◽  
Nermeen Bahgat ◽  
Mohamed Khafagy ◽  
Ragai Hatata ◽  
Dalia Sabry ◽  
...  
Keyword(s):  
Axial Length ◽  
Extraocular Muscle ◽  
Insertion Site ◽  
Anterior Segment ◽  
Swept Source ◽  
Anterior Segment Oct ◽  
Muscle Insertion

Effects of the Gaze Fixation Position on AS-OCT Measurements of the Limbus and Extraocular Muscle Insertion Site Distance

2021 ◽  
Vol 58 (1) ◽  
pp. 28-33
Author(s):  
Risako Inagaki ◽  
Hiroko Suzuki ◽  
Takashi Haseoka ◽  
Shinji Arai ◽  
Yuri Takagi ◽  
...  
Keyword(s):  
Extraocular Muscle ◽  
Insertion Site ◽  
Fixation Position ◽  
Gaze Fixation ◽  
The Gaze ◽  
Muscle Insertion

scholarly journals Shape analysis of rectus extraocular muscles with age and axial length using anterior segment optical coherence tomography

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0243382
Author(s):  
Kiyo Shibata ◽  
Atsushi Fujiwara ◽  
Ichiro Hamasaki ◽  
Takehiro Shimizu ◽  
Reika Kono ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Axial Length ◽  
Muscle Fibers ◽  
Insertion Site ◽  
Anterior Segment ◽  
Normal Subjects ◽  
Extraocular Muscles ◽  
Optical Coherence ◽  
Face Images ◽  
En Face

Purpose This study aimed to evaluate the shape of the extraocular muscles (EOMs) in normal subjects using the en-face images of anterior segment optical coherence tomography (AS-OCT). The EOM insertion and the direction of the muscle fibers were investigated. Subjects and methods A total of 97 healthy normal subjects (194 eyes) at Okayama University Hospital (age, 47.1±21.5 years; range, 8–79 years) participated in the study. A series of 256 tomographic images of the rectus EOMs were captured using the C-scan function of the AS-OCT (CASIA2, TOMEY Co., Japan), and the images were converted to en-face images in multi-TIFF format. The anterior chamber angle to EOM insertion distance (AID) and the angle of the muscle fibers from the insertion site (angle of muscles) were measured from the images. The correlations of AID and angle of muscles with age and axial length were investigated and evaluated. Results AID and angle of muscles were significantly correlated with age or axial length in some EOMs. The AIDs of medial rectus (MR) (P = 0.000) and superior rectus (SR) (P = 0.005) shortened with age. The AIDs of MR (P = 0.001) and inferior rectus (IR) (P = 0.035) elongated with axial length, whereas lateral rectus (LR) (P = 0.013) shortened. The angles of MR (P = 0.001) and LR (P = 0.000) were found to have a more downward direction toward the posterior in older subjects. Conclusion En-face images can be created by AS-OCT, and the shape of the EOMs in normal subjects using these image measurements was available. With the ability to assess the EOMs, AID and angle of muscles are expected give useful information for treating and diagnosing strabismus-related diseases.

scholarly journals Age- and refraction-related changes in anterior segment anatomical structures measured by swept-source anterior segment OCT

PLoS ONE ◽  
2020 ◽  
Vol 15 (10) ◽  
pp. e0240110
Author(s):  
Xiaobin Xie ◽  
Giulia Corradetti ◽  
Abe Song ◽  
Anmol Pardeshi ◽  
William Sultan ◽  
...  
Keyword(s):  
Anterior Segment ◽  
Swept Source ◽  
Anatomical Structures ◽  
Anterior Segment Oct

Analysis of ocular inflammation in anterior chamber—involving uveitis using swept-source anterior segment OCT

2018 ◽  
Vol 39 (8) ◽  
pp. 1793-1801 ◽  
Author(s):  
Elmira Baghdasaryan ◽  
Tudor C. Tepelus ◽  
Kenneth M. Marion ◽  
Jianyan Huang ◽  
Ping Huang ◽  
...  
Keyword(s):  
Anterior Chamber ◽  
Anterior Segment ◽  
Ocular Inflammation ◽  
Swept Source ◽  
Anterior Segment Oct

scholarly journals Morphological change of the posterior pole following the horizontal strabismus surgery with swept source optical coherence tomography

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yooyeon Park ◽  
Yong Chan Kim ◽  
Ye Jin Ahn ◽  
Shin Hae Park ◽  
Sun Young Shin
Keyword(s):  
Optical Coherence Tomography ◽  
Refractive Error ◽  
Extraocular Muscle ◽  
Anterior Segment ◽  
Rectus Muscle ◽  
Strabismus Surgery ◽  
Posterior Segment ◽  
Reconstruction Technique ◽  
Optical Coherence ◽  
Swept Source

AbstractExtraocular muscle movement during strabismus surgery causes changes in eyeball shape. Because extraocular muscle insertion is in front of the equator, it is thought that changes due to strabismus surgery mainly occur in the anterior segment. However, changes in the posterior segment of eye may also occur, which may also result in changes in refractive error after strabismus surgery. Using a 3-dimensional reconstruction technique (en face imaging) of the swept source optical coherence tomography, we determined and quantitatively measured the posterior polar change. The deepest interface between Bruch’s membrane and the choroid could be identified as the deepest point of the eyeball (DPE), and the location of the DPE relative to the optic disc and the fovea was measured. After lateral rectus muscle recession, the DPE moved away from the fovea, but after medial rectus muscle recession, the DPE moved toward the fovea. The amount of DPE movement differed by age and preoperative refractive error. Our findings suggest that the positional shift of the rectus muscle in horizontal strabismus surgery causes a structural change in the posterior segment of the eye, and the postoperative refractive changes may be related to this shift.

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