Impact of age, sex and refractive error on conjunctival and Tenon’s capsule thickness dimensions by swept-source optical coherence tomography in a large population

2021 ◽  
Author(s):  
José Ignacio Fernández-Vigo ◽  
Hang Shi ◽  
Bárbara Burgos-Blasco ◽  
Lucía De-Pablo-Gómez-de-Liaño ◽  
Ignacio Almorín-Fernández-Vigo ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Refractive Error ◽  
Large Population ◽  
Optical Coherence ◽  
Swept Source ◽  
Tenon’S Capsule ◽  
Tenon's Capsule ◽  
Capsule Thickness

Ciliary muscle dimensions by swept‐source optical coherence tomography and correlation study in a large population

2019 ◽  
Vol 98 (4) ◽  
Author(s):  
José Ignacio Fernández‐Vigo ◽  
Hang Shi ◽  
Bachar Kudsieh ◽  
Pedro Arriola‐Villalobos ◽  
Lucía De‐Pablo Gómez‐de‐Liaño ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Large Population ◽  
Correlation Study ◽  
Ciliary Muscle ◽  
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 Laser Lens Size Measurement Using Swept-Source Optical Coherence Tomography

2020 ◽  
Vol 10 (14) ◽  
pp. 4936
Author(s):  
Pingping Jia ◽  
Hong Zhao ◽  
Yuwei Qin
Keyword(s):  
Optical Coherence Tomography ◽  
High Speed ◽  
Wave Number ◽  
Radius Of Curvature ◽  
Optical Coherence ◽  
Swept Source ◽  
Laser Focusing ◽  
Fitting Algorithm ◽  
Laser Confocal Microscope ◽  
Focusing Lens

A high-speed, high-resolution swept-source optical coherence tomography (SS-OCT) is presented for focusing lens imaging and a k-domain uniform algorithm is adopted to find the wave number phase equalization. The radius of curvature of the laser focusing lens was obtained using a curve-fitting algorithm. The experimental results demonstrate that the measuring accuracy of the proposed SS-OCT system is higher than the laser confocal microscope. The SS-OCT system has great potential for surface topography measurement and defect inspection of the focusing lens.

scholarly journals Three-dimensional segmentation and depth-encoded visualization of choroidal vasculature using swept-source optical coherence tomography

2021 ◽  
pp. 153537022110285
Author(s):  
Hao Zhou ◽  
Tommaso Bacci ◽  
K Bailey Freund ◽  
Ruikang K Wang
Keyword(s):  
Optical Coherence Tomography ◽  
Three Dimensional ◽  
Age Related Macular Degeneration ◽  
Optical Coherence ◽  
Full Thickness ◽  
Swept Source ◽  
Automated Method ◽  
Choroidal Imaging ◽  
Choroidal Vasculature ◽  
Choroidal Vessels

The choroid provides nutritional support for the retinal pigment epithelium and photoreceptors. Choroidal dysfunction plays a major role in several of the most important causes of vision loss including age-related macular degeneration, myopic degeneration, and pachychoroid diseases such as central serous chorioretinopathy and polypoidal choroidal vasculopathy. We describe an imaging technique using depth-resolved swept-source optical coherence tomography (SS-OCT) that provides full-thickness three-dimensional (3D) visualization of choroidal anatomy including topographical features of individual vessels. Enrolled subjects with different clinical manifestations within the pachychoroid disease spectrum underwent 15 mm × 9 mm volume scans centered on the fovea. A fully automated method segmented the choroidal vessels using their hyporeflective lumens. Binarized choroidal vessels were rendered in a 3D viewer as a vascular network within a choroidal slab. The network of choroidal vessels was color depth-encoded with a reference to the Bruch’s membrane segmentation. Topographical features of the choroidal vasculature were characterized and compared with choroidal imaging obtained with indocyanine green angiography (ICGA) from the same subject. The en face SS-OCT projections of the larger choroid vessels closely resembled to that obtained with ICGA, with the automated SS-OCT approach proving additional depth-encoded 3D information. In 16 eyes with pachychoroid disease, the SS-OCT approach added clinically relevant structural details, including choroidal thickness and vessel depth, which the ICGA studies could not provide. Our technique appears to advance the in vivo visualization of the full-thickness choroid, successfully reveals the topographical features of choroidal vasculature, and shows potential for further quantitative analysis when compared with other choroidal imaging techniques. This improved visualization of choroidal vasculature and its 3D structure should provide an insight into choroid-related disease mechanisms as well as their responses to treatment.

Sign in / Sign up

Export Citation Format

Share Document