Optical coherence tomography angiography vessel density mapping at various retinal layers in healthy and normal tension glaucoma eyes

(1) Background: Topical antiglaucoma medications may alter the microcirculation in the optic nerve head. We aimed to evaluate the changes in retinal vessel density (VD) on optical coherence tomography angiography (OCTA) in patients with newly diagnosed normal-tension glaucoma (NTG) treated with a topical beta-blocker. (2) Methods: This study included 80 patients diagnosed with NTG not using systemic medication, who received topical carteolol treatment between December 2019 and November 2020. We studied the changes in the OCTA VD/signal strength index (SSI) after the 6-month treatment period and determined the predictive factors affecting the changes in VD/SSI. (3) Results: After the 6-month treatment period, the peripapillary VD increased in 40 patients but decreased in the other 40 patients. The univariate and multivariate analyses revealed that old age and hypertension were significant factors associated with a VD/SSI decrease after carteolol treatment. Moreover, high baseline peripapillary, superficial, and deep macular VDs were significantly associated with the VD decrease after carteolol treatment. (4) Conclusions: Carteolol treatment could increase or decrease the VD in patients with NTG. The baseline VD, age, and hypertension could affect these VD changes. Patients with NTG and higher baseline peripapillary or macular VD, older age, and hypertension are more likely to have a decreased VD after carteolol treatment.

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Foveal Avascular Zone in Normal Tension Glaucoma Measured by Optical Coherence Tomography Angiography

BioMed Research International ◽

10.1155/2017/3079141 ◽

2017 ◽

Vol 2017 ◽

pp. 1-7 ◽

Cited By ~ 7

Author(s):

Maja Zivkovic ◽

Volkan Dayanir ◽

Tolga Kocaturk ◽

Marko Zlatanovic ◽

Gordana Zlatanovic ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Optical Coherence Tomography Angiography ◽

Normal Tension Glaucoma ◽

Vessel Density ◽

Foveal Avascular Zone ◽

Maximum Diameter ◽

Control Group ◽

Optical Coherence ◽

Mean Values ◽

Avascular Zone

Aim. To measure diameter of foveal avascular zone (FAZ), FAZ area, and vessel density using Optical Coherence Tomography Angiography (OCT-A) in patients with normal tension glaucoma (NTG) and to establish the possible role of OCT-A in diagnosis and follow-up of patients with NTG. Methods. Twenty-one eyes of 21 patients with NTG and 30 eyes of 30 healthy subjects underwent complete ophthalmic examination as well as OCT-A on ZEISS AngioPlex. 3×3 macula scans were used to measure vertical, horizontal, and maximum diameter of FAZ by two graders. Mean values and interobserver variability were analyzed. Image J was used for analysis of FAZ area and vessel density. Results. Mean vertical diameter (t=5.58, p<0.001), horizontal diameter (t=3.59, p<0.001), maximum diameter (t=5.94, p<0.001), and FAZ area (t=5.76, p<0.001) were statistically significantly enlarged in the NTG group compared to those in the control group. Vessel density (t=-5.80, p<0.001) was statistically significantly decreased in the NTG group compared to that in the control group. Conclusion. OCT-A could have an important role in the future in diagnosis of patients with NTG. In patients with NTG, there is larger FAZ area, while the vessel density is reduced in comparison to the control group.

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Comparison of Optical Coherence Tomography Angiography and Laser Speckle Flowgraphy for the Diagnosis of Normal-Tension Glaucoma

Journal of Ophthalmology ◽

10.1155/2018/1751857 ◽

2018 ◽

Vol 2018 ◽

pp. 1-9 ◽

Cited By ~ 9

Author(s):

Asuka Takeyama ◽

Kyoko Ishida ◽

Ayako Anraku ◽

Masahiro Ishida ◽

Goji Tomita

Keyword(s):

Optical Coherence Tomography ◽

Optical Coherence Tomography Angiography ◽

Corneal Thickness ◽

Normal Subjects ◽

Normal Tension Glaucoma ◽

Laser Speckle ◽

Vessel Density ◽

Laser Speckle Flowgraphy ◽

Optical Coherence ◽

Diagnostic Ability

Purpose. To compare optical coherence tomography angiography (OCT-A) and laser speckle flowgraphy (LSFG) for the diagnosis of normal-tension glaucoma (NTG). Methods. Twenty-eight eyes of 28 patients with NTG and 25 eyes of 25 normal subjects matched for age, refractive errors, systemic blood pressure, and central corneal thickness were evaluated. OCT-A was used to measure whole image vessel density, inside disc vessel density, and peripapillary vessel density; using LSFG, mean blur rate (MBR) inside the whole optic nerve head (ONH) area (MBRA), and MBR of the vessel area (MBRV) and tissue area (MBRT) inside the ONH, were determined. Receiver operating characteristic (ROC) curves and areas under the ROC (AUROC) were used to assess the diagnostic ability of each variable. Results. The AUROC for OCT-A whole image vessel density (0.950) was significantly greater than that for OCT-A peripapillary vessel density (0.830) and for all LSFG parameters (MBRA = 0.793, MBRV = 0.601, and MBRT = 0.61) (P<0.001). The AUROC for OCT-A inside disc vessel density (0.931) was significantly greater than that for all LSFG parameters (P<0.005). Conclusions. OCT-A vessel density had a higher glaucoma diagnostic ability compared to all LSFG parameters in patients with NTG.

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Peripapillary and Macular Vessel Density in Dysthyroid Optic Neuropathy: An Optical Coherence Tomography Angiography Study

Investigative Opthalmology & Visual Science ◽

10.1167/iovs.18-25941 ◽

2019 ◽

Vol 60 (6) ◽

pp. 1863 ◽

Cited By ~ 8

Author(s):

Te Zhang ◽

Wei Xiao ◽

Huijing Ye ◽

Rongxin Chen ◽

Yuxiang Mao ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Optic Neuropathy ◽

Optical Coherence Tomography Angiography ◽

Vessel Density ◽

Optical Coherence ◽

Dysthyroid Optic Neuropathy

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The role of pattern electroretinograms and optical coherence tomography angiography in the diagnosis of normal-tension glaucoma

Scientific Reports ◽

10.1038/s41598-021-91813-z ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Sang Yeop Lee ◽

Nak-Hoon Son ◽

Hyoung Won Bae ◽

Gong Je Seong ◽

Chan Yun Kim

Keyword(s):

Optical Coherence Tomography ◽

Optical Coherence Tomography Angiography ◽

Early Stage ◽

Pattern Electroretinogram ◽

Normal Tension Glaucoma ◽

Optical Coherence ◽

Early Glaucoma ◽

Normal Individuals ◽

Auc Value ◽

Glaucoma Group

AbstractIn this study, we investigated the correlation between pattern electroretinogram (PERG) and optical coherence tomography angiography (OCTA) parameters for diagnosis in patients with normal-tension glaucoma (NTG). Forty-nine normal individuals (49 eyes) and 60 patients with NTG (60 eyes) were enrolled. OCTA and PERG parameters, such as macular vessel density (VD) and the amplitude of N35–P50 and P50–N95, were measured. Correlation analyses were performed between the parameters, and the area under the curve (AUC) was used to identify their diagnostic ability for NTG. Macular VD and the amplitude of N35–P50 and P50–N95 showed significant differences between the normal individuals and patients with NTG. Correlation between P50 and N95 amplitude and macular VD was significant in the normal and early glaucoma groups. Macular VD showed a higher AUC value (0.730) than that of P50–N95 amplitude (0.645) in the early glaucoma group. In the moderate to severe glaucoma group, the AUC value of the amplitude of P50–N95 (0.907) was higher than that of macular VD (0.876). The results indicate that PERG and OCTA parameters may identify glaucoma in its early stage, based on the severity of glaucomatous damage in patients with NTG.

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