Evaluation of Optic Disc Area Using Cirrus HD- Optical Coherence Tomography in Saudi Population

2020 ◽  
Vol 13 (4) ◽  
pp. 2152-2156
Author(s):  
Nawaf Almarzouki
Keyword(s):  
Optical Coherence Tomography ◽  
Optic Disc ◽  
Optical Coherence ◽  
Saudi Population ◽  
Disc Area

scholarly journals Correlations Between Digital Planimetry and Optical Coherence Tomography, Confocal Scanning Laser Ophthalmoscopy in Assessment of Optic Disc Parameters

Medicina ◽  
2012 ◽  
Vol 48 (3) ◽  
pp. 21
Author(s):  
Dovilė Buteikienė ◽  
Alvydas Paunksnis ◽  
Valerijus Barzdžiukas ◽  
Dalia Žaliūnienė ◽  
Jūratė Balčiūnienė ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optic Disc ◽  
Scanning Laser Ophthalmoscopy ◽  
Optical Coherence ◽  
Strongly Correlated ◽  
Biometric Parameters ◽  
Confocal Scanning Laser Ophthalmoscopy ◽  
Disc Area ◽  
Confocal Scanning ◽  
Confocal Scanning Laser

Objective and Aim. In routine clinical practice, laser methods for the evaluation of optic disc parameters are expensive and not accessible for all ophthalmologists; therefore, there is a need for less expensive technique. The aim of this study was to assess correlations between the parameters of the optic disc measured by digital planimetry (DP), optical coherence tomography (OCT), and confocal scanning laser ophthalmoscopy (CSLO) in healthy and glaucoma patients with the normal biometric parameters of the eye. Material and Methods. This case-control study enrolled 40 patients with glaucoma and 32 healthy patients with the normal biometric parameters of the eye. All subjects underwent full ophthalmologic examination, digital color optic disc photography, OCT, and CSLO at the same visit. The optic disc was morphometrically analyzed by DP, OCT, and CSLO. Seven optic disc parameters were evaluated. Results. In the glaucoma group, the optic disc and cup areas (r=0.7–0.8, P<0.001) and cup-tooptic disc and rim-to-optic disc area ratios (r=0.7, P<0.001) measured by DP were strongly correlated with those measured by OCT and CSLO, while the horizontal and vertical cup-to-optic disc diameter ratios were found to be moderately correlated (r=0.6–0.7, P<0.001). In healthy patients, the optic disc and cup areas were strongly correlated (r=0.7–8.0, P<0.001). Significant differences in all optic disc parameters, except for the optic disc area, measured by DP, OCT, and CSLO were found between glaucoma and healthy patients. Conclusions. Strong correlations between the parameters of the optic disc measured by DP, OCT, and CSLO were found. There were significant differences in the parameters between healthy and glaucoma eyes measured using DP; therefore, this technique may be used for diagnosis, management, and screening of glaucoma.

scholarly journals Artifacts of optical coherence tomography

2019 ◽  
Vol 12 (1) ◽  
pp. 75-80
Author(s):  
A. A. Shpak ◽  
M. V. Korobkova
Keyword(s):  
Optical Coherence Tomography ◽  
Optic Disc ◽  
Plexiform Layer ◽  
Inner Plexiform Layer ◽  
Optical Coherence ◽  
Macular Area ◽  
Epiretinal Membranes ◽  
Disc Area ◽  
Disc Region ◽  
Clinically Significant

Purpose. To study and classify artifacts of spectral-domain optical coherence tomography (OCT).  Material and methods. The retrospective study included OCT data of 112 patients (112 eyes)  examined on two Cirrus HD-OCTs (Carl Zeiss Meditec) sequentially for three days (macular area examinations, 67 patients) and five days (examination of the optic disc region, 62 people), including 17 people who underwent both types of examination. Both the original scanning data (B-scans) and the results of their subsequent analysis were evaluated for the presence of artifacts. Results. The criteria of OCT artifacts were suggested and their practical classification was proposed, which distinguishes three types of artifacts: segmentation errors/errors in delineation of the optic disc borders, "out-of-register" artifacts and displacement/fallout of B-scans, and eight main causes of artifacts. The frequency of artifacts ranged from 19 % (analysis of the optic disc area) to 37 % (analysis of the macular area) and 65 % (evaluation of the ganglion cell-inner plexiform layer). The most common were segmentation errors in patients with pronounced pathology or epiretinal membranes (fibrosis). Conclusion. Clinically significant OCT artifacts occur in 19–65 % of cases, depending on the analyzed eye fundus structures. The most common artifacts are segmentation errors in patients with pronounced pathology and epiretinal membranes (fibrosis). A practical classification of OCT artifacts is proposed, which distinguishes three main types and the most important causes of their presence.

Optic disc morphometry using spectral domain optical coherence tomography in a Nigerian population

2021 ◽  
pp. 112067212110087
Author(s):  
Oluwaseun Olaniyi Awe ◽  
Oluwatoyin Helen Onakpoya ◽  
Adenike Odunmorayo Adeoye
Keyword(s):  
Optical Coherence Tomography ◽  
Optic Disc ◽  
Retinal Nerve Fibre Layer ◽  
Spectral Domain ◽  
Optical Coherence ◽  
Female Ratio ◽  
Disc Diameter ◽  
Disc Area ◽  
Nigerian Population ◽  
The Mean

Purpose: To assess morphological optic disc dimensions using spectral-domain optical coherence tomography (OCT) in a Nigerian population. Materials and method: Good quality SD-OCT scans of the optic disc of 147 eyes of 88 participants were selected, enrolled, and retrospectively reviewed. All subjects had optic nerve head and retinal nerve fibre layer OCT imaging, as well as analysis, done using the Topcon 3D OCT-1 Maestro®. The age, sex, and some OCT-generated optic disc dimensions namely disc area (DA), vertical disc diameter (VDD), horizontal disc diameter (HDD) were retrieved from the database and analyzed. Results: The mean age of the study subjects was 52.6±20.9 years with a range of 8–90 years; male to female ratio was 1:1.3. The right eye and left eye accounted for 75 and 72 of the 147 scans respectively. The mean DA, VDD, and HDD were 2.54 ± 0.48 mm2, 1926.5 ± 189.6 μm and 1673.9 ± 173.9 μm, respectively. Males had significantly larger DA than females (2.56 ± 0.53 mm2 vs 2.51 ± 0.44 mm2, p = 0.043). The mean DA and VDD of eyes of subjects aged 21–40 years were significantly higher compared to subjects aged 60 years and more ( p = 0.008 and 0.001, respectively). Conclusion: The mean optic disc area and diameters are larger than those reported in similar studies involving blacks and other races. The mean disc area reduces with increasing age.

Hyperreflective dots surrounding the central retinal artery and vein in optic disc melanocytoma revealed by spectral domain optical coherence tomography

2012 ◽  
Vol 57 (1) ◽  
pp. 108-112 ◽  
Author(s):  
Akiko Okubo ◽  
Kazuhiko Unoki ◽  
Hiroshi Yoshikawa ◽  
Tatsuro Ishibashi ◽  
Munefumi Sameshima ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optic Disc ◽  
Central Retinal Artery ◽  
Spectral Domain ◽  
Optical Coherence ◽  
Retinal Artery

scholarly journals Influence of Clinically Invisible, but Optical Coherence Tomography Detected, Optic Disc Margin Anatomy on Neuroretinal Rim Evaluation

2012 ◽  
Vol 53 (4) ◽  
pp. 1852 ◽  
Author(s):  
Alexandre S. C. Reis ◽  
Neil O'Leary ◽  
Hongli Yang ◽  
Glen P. Sharpe ◽  
Marcelo T. Nicolela ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optic Disc ◽  
Optical Coherence ◽  
Neuroretinal Rim

scholarly journals Optical Coherence Tomography Angiography Features of Macular Epiretinal Neovascularization In Eales’ Disease: A Case Rreport

2021 ◽  
Author(s):  
Nora Alyousif ◽  
Abrar K. Alsalamah ◽  
Hassan Aldhibi
Keyword(s):  
Optical Coherence Tomography ◽  
Blood Vessels ◽  
Optic Disc ◽  
Optical Coherence Tomography Angiography ◽  
Internal Limiting Membrane ◽  
Peripheral Retina ◽  
Optical Coherence ◽  
Retinal Capillary ◽  
Eales Disease ◽  
The Right

Abstract Background: Eales disease primarily affects the peripheral retina. However, posterior involvement can be seen. Macular epiretinal neovascularization is not commonly seen in Eales disease. This report highlights the morphology and origin of macular epiretinal neovascularization (ERN) using multimodal retinal imaging, including optical coherence tomography angiography (OCTA). Results: A 35-year-old man with no history of systemic disorders presented with gradual decrease of vision in his left eye. Fundus examination of his right eye showed peripheral sclerosed blood vessels, neovascularization of the optic disc and elsewhere, and macular ERN. The view of the left fundus was limited by vitreous haemorrhage. Fluorescein angiography (FA), of the right eye showed widespread peripheral capillary nonperfusion and leakage of dye from the retinal neovascularization and macular ERN. Macular Spectral domain optical coherence tomography (SD-OCT) of the right eye showed an epiretinal membrane and the presence of epiretinal neovascular lesions extending above the internal limiting membrane towards the vitreous. Optical coherence tomography angiography (OCTA) showed multiple tiny blood vessels at the macula that arose from the superficial retinal capillary plexuses and extended toward the vitreous. The corresponding B-scan showed flow signal through these vessels and the signal extend above the internal limiting membrane. Systemic work-up was negative except for strongly positive tuberculin skin testing giving the classic diagnosis of Eales disease. Patient was started on empirical anti-tubercular therapy and oral corticosteroids. Scatter laser photocoagulation was applied to nonperfused retinal zones. Despite adequate scatter laser ablation, the ERN failed to regress fully. Conclusions: Macular ERN can be seen in cases of classic Eales disease. The origin of macular ERN in our case was shown to be from the superficial retinal capillary plexuses. We also noted the slower regression rate of macular ERN as compared to the major neovascularizations of the optic disc and peripheral retina. Further research is needed to establish the pathogenesis of ERN and its optimal management.

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