A Prospective, Comparative, Observational Study on Optical Coherence Tomography of the Anterior Eye Segment

2013 ◽  
Vol 230 (4) ◽  
pp. 222-226 ◽  
Author(s):  
Thomas Theelen ◽  
Carel B. Hoyng
Keyword(s):  
Optical Coherence Tomography ◽  
Observational Study ◽  
Optical Coherence ◽  
Anterior Eye Segment

Accuracy of anterior segment optical coherence tomography for pre-operative localization of insertions of extraocular recti muscles

2020 ◽  
pp. 112067212097119
Author(s):  
Sreeram Jayaraj ◽  
Anupam Singh ◽  
Ajai Agrawal ◽  
Rakesh Panyala ◽  
Ramanuj Samanta ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Observational Study ◽  
Anterior Segment ◽  
Accurate Method ◽  
Strabismus Surgery ◽  
Optical Coherence ◽  
Altman Analysis ◽  
Bland Altman Analysis ◽  
Squint Surgery ◽  
Level Of Agreement

Introduction: To study the accuracy of anterior segment optical coherence tomography (AS-OCT) function of Cirrus HD-OCT 500 (Carl Zeiss Meditec, Dublin, CA) in calculating the insertion of rectus muscles from the limbus in patients undergoing primary squint surgery. Methodology: A prospective, double-masked, observational study was conducted on 128 muscles of 46 patients with strabismus who were planned for strabismus surgery between January 2019 and December 2019. Insertion distance from limbus was measured using AS-OCT function of Cirrus HD-OCT 500 preoperatively. Intraoperative measurements were taken using Castroviejo caliper. A Bland-Altman analysis was performed to determine the agreement between the readings. Results: A total of 128 muscles were successfully imaged and evaluated, including 13 superior recti (10.15%), 23 inferior recti (17.96%), 35 medial recti (27.34%) and 57 lateral recti (44.53%). 124 muscles (96.9%) were within 1mm difference, which was considered clinically acceptable. Bland-Altman plots showed the level of agreement between the two methods was good. Conclusion: Anterior segment scan function of Cirrus HD-OCT 500 is an accurate method to detect the insertion of extraocular recti muscles in patients of primary strabismus surgery.

Imaging of the whole anterior eye segment with full-range complex spectral domain optical coherence tomography

2009 ◽  
Author(s):  
Johannes Jungwirth ◽  
Bernhard Baumann ◽  
Michael Pircher ◽  
Erich Götzinger ◽  
Christoph K. Hitzenberger
Keyword(s):  
Optical Coherence Tomography ◽  
Full Range ◽  
Spectral Domain ◽  
Optical Coherence ◽  
Anterior Eye Segment

scholarly journals Optical Coherence Tomography in an Infant with Walker-Warburg Syndrome

2015 ◽  
Vol 6 (2) ◽  
pp. 210-215 ◽  
Author(s):  
Natsuko Mano ◽  
Tatsuma Mitsutsuji ◽  
Yamato Yoshikawa ◽  
Makiko Miyamoto ◽  
Hiroko Watanabe ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Congenital Muscular Dystrophy ◽  
Congenital Glaucoma ◽  
Optical Coherence ◽  
Anterior Eye Segment ◽  
High Incidence ◽  
Cranial Mri ◽  
Retinal Dysplasia ◽  
Choroidal Vessels ◽  
Fundus Pigmentation

Purpose: Walker-Warburg syndrome (WWS) is a type of congenital muscular dystrophy (CMD) characterised by severe brain malformation, lissencephaly, and congenital eye abnormalities. Despite the coexistence of various eye abnormalities, results from optical coherence tomography (OCT) in WWS have not previously been reported. We herein report specific OCT findings in an infant with WWS. Patients and Methods: The patient was a 14-day-old boy delivered by caesarean section at 38 weeks and 4 days of gestation and with a birth weight of 2,543 g. A cranial MRI showed lissencephaly, hydrocephalus, an encephalocele, and cerebellar hypoplasia, consistent with the diagnosis of WWS. Results: A bilateral ocular examination showed no abnormalities of the anterior eye segment. A fundus examination showed a persistent hyaloid artery in the vitreous cavity, a widespread loss of fundus pigmentation, transparent choroidal vessels (some choroidal vessel sections were visible), and the absence of a distinct macular reflex. OCT showed no foveal pit and an indistinct laminar structure of the retina. The infant subsequently developed congenital glaucoma and he then died of respiratory failure at the age of 8 months. Conclusions: WWS is associated with a high incidence of congenital eye abnormalities, and this infant showed findings consistent with WWS. OCT revealed a marked retinal dysplasia.

Photoreceptor morphology and correlation with subretinal fluid chronicity associated with choroidal nevus

2019 ◽  
Vol 104 (6) ◽  
pp. 863-867 ◽  
Author(s):  
Antonio Yaghy ◽  
Michael D Yu ◽  
Lauren A Dalvin ◽  
Mehdi Mazloumi ◽  
Sandor R Ferenczy ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Observational Study ◽  
Subretinal Fluid ◽  
Retrospective Observational Study ◽  
Optical Coherence ◽  
Progressive Change ◽  
Choroidal Nevus ◽  
Over Time ◽  
Choroidal Nevi

BackgroundSubretinal fluid (SRF) can be associated with choroidal nevus and can cause progressive change in the morphology of overlying photoreceptors.MethodsA retrospective observational study was performed using optical coherence tomography to assess nevus and SRF features, as well as photoreceptor morphology over time.ResultsThere were 232 choroidal nevi that presented with or developed SRF. Photoreceptor morphology at presentation was classified as normal (n=60, 26%), shaggy (elongated) (n=73, 31%), retracted (stalactite appearance) (n=76, 33%), or absent (n=23, 10%). There was a progression in photoreceptor morphology with increasing SRF chronicity (p=0.003). For nevus presenting with normal photoreceptors and later developed SRF (n=60), photoreceptors became shaggy in 29 (48%), retracted in 24 (40%), and absent in 7 (12%) after 15, 19 and 22 months, respectively. For nevus presenting with SRF and shaggy photoreceptors (n=73), progression to retracted photoreceptors occurred in 31 (42%) after a mean of 22 months; for nevus with SRF and retracted photoreceptors (n=76), progression to absent photoreceptors occurred in 19 (25%) after a mean of 34 months; and for nevus with absent photoreceptors (n=23), photoreceptor morphology showed no change after mean follow-up of 33 months. Risk of nevus growth to melanoma was not associated with photoreceptor morphology at presentation (p=0.19).ConclusionIn eyes with choroidal nevus and SRF, there is a longitudinal evolution in photoreceptor morphology from normal to shaggy to retracted then absent with increasing SRF chronicity. SRF chronicity, as indicated by photoreceptor morphology on presentation, did not correlate with nevus growth to melanoma.

scholarly journals Validation of human small-airway measurements using endobronchial optical coherence tomography: an observational study

The Lancet ◽  
2015 ◽  
Vol 386 ◽  
pp. S1
Author(s):  
Yu Chen ◽  
Ming Ding ◽  
Wei-Jie Guan ◽  
Wei-Zhan Luo ◽  
Chang-Hao Zhong ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Observational Study ◽  
Small Airway ◽  
Optical Coherence
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