Comparison of the Measurements by AngioAnalytics ™ Before and After Cataract Surgery Using Optical Coherence Tomography Angiography

Background and Objective. To determine optimal image averaging settings for Spectralis optical coherence tomography (OCT) in patients with and without cataract. Study Design/Material and Methods. In a prospective study, the eyes were imaged before and after cataract surgery using seven different image averaging settings. Image quality was quantitatively evaluated using signal-to-noise ratio, distinction between retinal layer image intensity distributions, and retinal layer segmentation performance. Measures were compared pre- and postoperatively across different degrees of averaging. Results. 13 eyes of 13 patients were included and 1092 layer boundaries analyzed. Preoperatively, increasing image averaging led to a logarithmic growth in all image quality measures up to 96 frames. Postoperatively, increasing averaging beyond 16 images resulted in a plateau without further benefits to image quality. Averaging 16 frames postoperatively provided comparable image quality to 96 frames preoperatively. Conclusion. In patients with clear media, averaging 16 images provided optimal signal quality. A further increase in averaging was only beneficial in the eyes with senile cataract. However, prolonged acquisition time and possible loss of details have to be taken into account.

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Optical Coherence Tomography Angiography of Retinal Arterial Macroaneurysm before and after Treatment

Case Reports in Ophthalmological Medicine ◽

10.1155/2018/5474903 ◽

2018 ◽

Vol 2018 ◽

pp. 1-4

Author(s):

Victoria S. Chang ◽

Stephen G. Schwartz ◽

Harry W. Flynn

Keyword(s):

Optical Coherence Tomography ◽

Fluorescein Angiography ◽

Multimodal Imaging ◽

Optical Coherence Tomography Angiography ◽

Intravitreal Bevacizumab ◽

Optical Coherence ◽

Flow Signal ◽

Retinal Arterial Macroaneurysm ◽

Diagnosis And Management ◽

Before And After

A case of retinal arterial macroaneurysm (RAM) is presented with multimodal imaging, including commercially available optical coherence tomography angiography (OCT-A). Following treatment with intravitreal bevacizumab, reduction of flow signal through the RAM is documented. OCT-A provides useful information for the diagnosis and management of at least some patients with RAM, without the need for traditional fluorescein angiography.

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Changes in the Foveal Avascular Zone after Uncomplicated Cataract Surgery Based on Optical Coherence Tomography Angiography

Journal of the Korean Ophthalmological Society ◽

10.3341/jkos.2020.61.5.514 ◽

2020 ◽

Vol 61 (5) ◽

pp. 514-523

Author(s):

Hee Jung Yang ◽

Ki Seok Kim

Keyword(s):

Optical Coherence Tomography ◽

Cataract Surgery ◽

Optical Coherence Tomography Angiography ◽

Foveal Avascular Zone ◽

Optical Coherence ◽

Avascular Zone

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A Comparative Evaluation of Macular Thickness after Phacoemulsification and Manual SICS in Diabetic Patients by Optical Coherence Tomography

International Journal of Research and Review ◽

10.52403/ijrr.20210766 ◽

2021 ◽

Vol 8 (7) ◽

pp. 468-472

Author(s):

Saswati Biswas ◽

Santosh Yadawrao Ingle ◽

Samiran Das

Keyword(s):

Optical Coherence Tomography ◽

Cataract Surgery ◽

Macular Edema ◽

Macular Thickness ◽

Diabetic Patients ◽

Optical Coherence ◽

Small Incision Cataract Surgery ◽

High Rise ◽

Small Incision ◽

Before And After

Background: The main aim of the study is to compare the change in macular thickness after uncomplicated phacoemulsification versus uncomplicated manual SICS in known diabetic patients by optical coherence tomography Methods: This study was an observational study involving 50 patients with each group having 25 patients. Group 1 was operated with Phacoemulsification through limbal 2.8 mm incision with Foldable PCIOL implantation. & Manual small incision cataract surgery through 5.5 to 6.5 mm incision with sclerocorneal tunnel with PMMA PCIOL implantation. For all patients, macular OCT was performed during preoperative period & post-op 1st day,7th day, 1st month, 3rd month & 6th month. Statistical software SPSS, version 21.0 was used for statistical analysis. Results: In both PHACO & SICS group MCFT rose steadily during post-operative period and SICS group shows high rise during follow up.The MCFT shows a difference between PHACO & SICS group with the highest MCFT observed in 1st month follow up i.e., 231.6 micrometer (SD ±7.831) in PHACO group & 241.64 (SD ±7.35) micrometer in SICS group. The MCFT returned to near pre-op value by the 6th month. Conclusion: There is no effect of age and sex on macular thickness before and after in both PHACO and SICS groups. In SICS group significant macular thickness was observed as compared to PHACO group, so there should be more cautious to undertake SICS in those patients who are at risk of developing macular edema or who have a higher macular thickness as seen in diabetes patients. Keywords: Phacoemulsification (PHACO), small incision cataract surgery (SICS), Cystoid macular edema.

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