Assessment of optic nerve head parameters using optical coherence tomography angiography in behçet uveitis patients with healthy controls

Abstract Background This study aim to evaluate neurovascular changes in both macula and optic nerve head (ONH) in early stages of diabetic retinopathy (DR) using combined quantitative optical coherence tomography angiography (OCTA) parameters.Methods We studied 194 right eyes from 64 type 2 diabetic patients without DR (DM), 64 diabetic patients with nonproliferative diabetic retinopathy (NPDR) and 64 age-matched healthy controls. OCTA parameters were analyzed using binary logistic regression models and receiver operating characteristic (ROC) curves.Results There was significant reduction of vessel density (VD) in both macula and ONH comparing DM patients with and without NPDR to controls. The area under the curve (AUC) of the ROC curve for NPDR versus control was 0.963 ( p <0.001), with sensitivity of 93.8% and specificity of 90.6%. The ROC curves for NPDR patients versus NoDR patients (including DM and control groups) exhibited an AUC of 0.923 ( p <0.001), with sensitivity of 90.6% and specificity of 82.8%. The thickness of the retinal nerve fiber layer (RNFL) in both macula and ONH was not significantly different among these three groups.Conclusions VD in both macula and ONH was simultaneously decreased prior to RNFL thinning in DM patients through the course proceeding from preclinical DR to NPDR. Combined analysis of macula and ONH parameters was an comprehensive and accurate OCTA metric to distinguish NPDR patients from healthy controls and DM patients without DR.

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Study of peripapillary vascular flow using optical coherence tomography angiography in optic nerve head drusen

Clinical and Experimental Ophthalmology ◽

10.1111/ceo.13783 ◽

2020 ◽

Vol 48 (6) ◽

pp. 775-782 ◽

Cited By ~ 1

Author(s):

Mercedes Leal‐González ◽

Filipa Pessanha ◽

Martim Azevedo González‐Oliva ◽

Elia Pérez‐Fernández ◽

Pablo Gili

Keyword(s):

Optical Coherence Tomography ◽

Optic Nerve ◽

Optic Nerve Head ◽

Optical Coherence Tomography Angiography ◽

Optical Coherence ◽

Vascular Flow ◽

Optic Nerve Head Drusen

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Vascular density of optic nerve head in diabetic retinopathy using optical coherence tomography angiography

International Journal of Retina and Vitreous ◽

10.1186/s40942-020-00269-2 ◽

2020 ◽

Vol 6 (1) ◽

Author(s):

Fariba Ghassemi ◽

Sahar Berijani ◽

Ramak Roohipoor ◽

Masoumeh Mohebbi ◽

Ameneh Babeli ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Diabetic Retinopathy ◽

Optic Nerve ◽

Optic Nerve Head ◽

Optical Coherence Tomography Angiography ◽

Blood Perfusion ◽

Cross Sectional Study ◽

Vascular Density ◽

Optical Coherence ◽

Cross Sectional

Abstract Purpose To measure optic nerve head (ONH) blood perfusion using optical coherence tomography angiography (OCTA) at various stages of diabetic retinopathy (DR). Methods One hundred seventy six eyes of 94 patients included in this retrospective single-centre cross-sectional study. The subjects were studied in normal, no diabetic retinopathy (NDR), non-proliferative diabetic retinopathy (NPDR) and proliferative retinopathy (PDR) groups. The eyes were subjected to AngioDisc ONH imaging using OCTA for papillary (Disc) and peripapillary (RPC) vascular density (VD) evaluation. Results The mean age of the participants was 56.08 ± 8.87 years and 34 (36.2 percent) were male. With increased DR severity, a statistically significant decrease in peripapillary VD was found. The study showed that only VD of the whole RPC (W-RPC) could be a valid biomarker in the staging assessment. VD of RPC, in all subsections, was considerably different from normal cases in the PDR group. Visual acuity was correlated with whole image ONH VD. The duration of DM, FBS, hyperlipidemia and DME had no effect on the ONH perfusion. Conclusions The study showed that only the W-RPC VD could be a reasonable marker in the staging assessment. VDs assessed by OCTA can be useful for assessing and tracking early ONH changes in DR patients.

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Reproducibility of macular and optic nerve head vessel density measurements by swept-source optical coherence tomography angiography

European Journal of Ophthalmology ◽

10.1177/1120672119834472 ◽

2019 ◽

Vol 30 (4) ◽

pp. 756-763 ◽

Cited By ~ 7

Author(s):

José Ignacio Fernández-Vigo ◽

Bachar Kudsieh ◽

Ana Macarro-Merino ◽

Pedro Arriola-Villalobos ◽

José María Martínez-de-la-Casa ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Optic Nerve ◽

Optic Nerve Head ◽

Optical Coherence Tomography Angiography ◽

Central Zone ◽

Vessel Density ◽

Optical Coherence ◽

Outer Retina ◽

Swept Source ◽

Capillary Plexus

Purpose: To assess the reproducibility of swept-source optical coherence tomography angiography (SS-OCTA) for macular and optic nerve head (ONH) vessel density (VD). Methods: Cross-sectional study using the Triton OCTA (Topcon, Tokyo, Japan), for VD (%) measurements in 40 eyes of 40 healthy subjects on two 6 × 6 mm scans of the macula and ONH across five subfields (central, superior, inferior, temporal, and nasal) at different segmentation levels: superficial capillary plexus (SCP), deep capillary plexus (DCP), outer retina, and choriocapillaris. Reproducibility values were summarized as intraclass correlation coefficients (ICCs) and coefficients of variations (CV). Results: ICCs for the macular VD measurements in the central zone were 0.874, 0.770, 0.575, 0.718 at the levels SCP, DCP, outer retina, and choriocapillaris, respectively, while worse ICCs were obtained for the parafoveal subfields (ICC ⩽ 0.589); CVs were 2.8%–6.7%. The reproducibility of the ONH superficial VD was ICC = 0.941 for the papillary region and was ICC = 0.499–0.853 for the peripapillary zone; CVs ranged from 4.8% to 17%. Peripapillary VD showed an ICC = 0.533–0.770 in the DCP layer, and 0.572–0.828 in the choriocapillaris. Lowest VD were obtained for the macular SCP and DCP (23% and 22%, respectively), in the foveal zone, while greatest VD were recorded in the nasal and temporal peripapillary subfields at the level of the choriocapillaris (both 68%). Conclusions: The new SS-OCTA software served to quantify macular and ONH VD with a reproducibility that was good in the central zones (foveal and papillary, respectively) and moderate in the peripheral zones (parafoveal and peripapillary).

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Optical Coherence Tomography in Patients with Chiari I Malformation

BioMed Research International ◽

10.1155/2015/756261 ◽

2015 ◽

Vol 2015 ◽

pp. 1-7 ◽

Cited By ~ 1

Author(s):

Michele Figus ◽

Chiara Posarelli ◽

Francesco Nasini ◽

Paolo Perrini ◽

Mario Miccoli ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Optic Nerve ◽

Optic Nerve Head ◽

Chiari I Malformation ◽

Nerve Fibers ◽

Healthy Controls ◽

Optical Coherence ◽

Fiber Layer ◽

Rnfl Thickness ◽

Chiari I

Background/Aims. To evaluate optic nerve head with spectral domain optical coherence tomography (OCT) in patients with Chiari I malformation (CMI) compared to healthy controls.Methods. Cross-sectional study. OCT of the optic nerve head of 22 patients with CMI and 22 healthy controls was quantitatively analyzed. The healthy controls were matched for age and sex with the study population. Mean retinal nerve fiber layer (RNFL) thickness was calculated for both eyes; the mean thickness value was also registered for each quadrant and for each subfield of the four quadrants.Results. CMI patients showed a reduction of the RNFL thickness in both eyes. This reduction was more statistically significant (P<0.05) for the inferior quadrant in the right eye and in each quadrant than nasal one in the left eye.Conclusion. A distress of the retinal nerve fibers could explain the observed reduction of the RNFL thickness in patients with CMI; in our series the reduction of the RNFL thickness seems lower when CMI is associated with syringomyelia.

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