scholarly journals Horizontal Extraocular Muscle and Scleral Anatomy in Children: A Swept-Source Anterior Segment Optical Coherence Tomography Study

2018 ◽  
Vol 32 (2) ◽  
pp. 83 ◽  
Author(s):  
Jung Yeob Han ◽  
Dong Cheol Lee ◽  
Se Youp Lee
Keyword(s):  
Optical Coherence Tomography ◽  
Extraocular Muscle ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Swept Source

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.

scholarly journals Objective quantification of lens nuclear opacities using swept-source anterior segment optical coherence tomography

2021 ◽  
pp. bjophthalmol-2020-318334
Author(s):  
Wei Wang ◽  
Jiaqing Zhang ◽  
Xiaoxun Gu ◽  
Xiaoting Ruan ◽  
Xiaoyun Chen ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Visual Acuity ◽  
Anterior Segment ◽  
Training Dataset ◽  
Dissipated Energy ◽  
Nuclear Density ◽  
Optical Coherence ◽  
Nuclear Cataract ◽  
Swept Source ◽  
Ultrasonic Time

Background/aimsThe primary objective is to quantify the lens nuclear opacity using swept-source anterior segment optical coherence tomography (SS-ASOCT) and to evaluate its correlations with Lens Opacities Classification System III (LOCS-III) system and surgical parameters. The secondary objective is to assess the diagnostic performance for hard nuclear cataract.MethodsThis cross-sectional study included 1222 patients eligible for cataract surgery (1222 eyes). The latest SS-ASOCT (CASIA-2) was used to obtain high-resolution lens images, and the average nuclear density (AND) and maximum nuclear density (MND) were measured by a custom ImageJ software. Spearman’s correlations analysis was used to assess associations of AND/MND with LOCS-III nuclear scores, visual acuity and surgical parameters. The subjects were then split randomly (9:1) into the training dataset and validating dataset. Receiver operating characteristic curves and calibration curves were constructed for the classification on hard nuclear cataract.ResultsThe AND and MND from SS-ASOCT images were significantly correlated with nuclear colour scores (AND: r=0.716; MND: r=0.660; p<0.001) and nuclear opalescence scores (AND: r=0.712; MND: r=0.655; p<0.001). The AND by SS-ASOCT images had the highest values of Spearman’s r for preoperative corrected distance visual acuity (r=0.3131), total ultrasonic time (r=0.3481) and cumulative dissipated energy (r=0.4265). The nuclear density had good performance in classifying hard nuclear cataract, with area under the curves of 0.859 (0.831–0.886) for AND and 0.796 (0.768–0.823) for MND.ConclusionObjective and quantitative evaluation of the lens nuclear density using SS-ASOCT images enable accurate diagnosis of hard nuclear cataract.

Relevance of Swept-Source Anterior Segment Optical Coherence Tomography for Corneal Imaging in Patients With Flap-Related Complications After LASIK

Cornea ◽  
2019 ◽  
Vol 38 (1) ◽  
pp. 93-97 ◽  
Author(s):  
Khaled Abdelazeem ◽  
Mohamed Sharaf ◽  
Mohamed G. A. Saleh ◽  
Ahmed M. Fathalla ◽  
Wael Soliman
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Swept Source ◽  
Corneal Imaging

Morphometric Measurement of Schlemm′s Canal Using Anterior Segment Swept Source Optical Coherence Tomography

2013 ◽  
Vol 50 (8) ◽  
pp. 080014
Author(s):  
史国华 Shi Guohua ◽  
王飞 Wang Fei ◽  
李喜琪 Li Xiqi ◽  
孙兴怀 Sun Xinghuai ◽  
姜春晖 Jiang Chunhui ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Morphometric Measurement ◽  
Swept Source

Impact of Cataract Surgery on Filtering Bleb Morphology Identified Via Swept-source 3-dimensional Anterior Segment Optical Coherence Tomography

2019 ◽  
Vol 28 (5) ◽  
pp. 433-439
Author(s):  
Akiko Narita ◽  
Yuki Morizane ◽  
Tomoe Miyake ◽  
Kae Sugihara ◽  
Tomoko Ishikawa ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Cataract Surgery ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Swept Source ◽  
3 Dimensional ◽  
Filtering Bleb

Comparison of Scheimpflug and swept-source anterior segment optical coherence tomography in normal and keratoconus eyes

2016 ◽  
Vol 37 (4) ◽  
pp. 965-971 ◽  
Author(s):  
Seyed Mohammad Ghoreishi ◽  
Seyed Ali Akbar Mortazavi ◽  
Zahra-Alsadat Abtahi ◽  
Mohammad-Ali Abtahi ◽  
Seyed Ali Sonbolestan ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Swept Source
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