SD-OCT peripapillary nerve fibre layer and ganglion cell complex parameters in glaucoma: principal component analysis

2020 ◽  
pp. bjophthalmol-2020-316296
Author(s):  
Marta Pazos ◽  
Marc Biarnés ◽  
Andrés Blasco-Alberto ◽  
Agnieszka Dyrda ◽  
Miguel Ángel Luque-Fernández ◽  
...  
Keyword(s):  
Principal Component Analysis ◽  
Ganglion Cell ◽  
Nerve Fibre ◽  
Principal Component ◽  
Component Analysis ◽  
Cell Complex ◽  
Ganglion Cell Complex ◽  
Discriminative Ability ◽  
Nerve Fibre Layer ◽  
Sd Oct

Background/aimsTo identify objective glaucoma-related structural features based on peripapillary (p) and macular (m) spectral domain optical coherence tomography (SD-OCT) parameters and assess their discriminative ability between healthy and glaucoma patients.MethodsTwo hundred and sixty eyes (91 controls and 169 glaucoma) were included in this prospective study. After a complete examination, all participants underwent the posterior pole and the peripapillary retinal nerve fibre layer (pRNFL) protocols of the Spectralis SD-OCT. Principal component analysis (PCA), a data reduction method, was applied to identify and characterise the main information provided by the ganglion cell complex (GCC). The discriminative ability between healthy and glaucomatous eyes of the first principal components (PCs) was compared with that of conventional SD-OCT parameters (pRNFL, macular RNFL (mRNFL), macular ganglion cell layer (mGCL)and macular inner plexiform layer (mIPL)) using 10-fold cross-validated areas under the curve (AUC).ResultsThe first PC explained 58% of the total information contained in the GCC and the pRNFL parameters and was the result of a general combination of almost all variables studied (diffuse distribution). Other PCs were driven mainly by pRNFL and mRNFL measurements. PCs and pRNFL had similar AUC (0.95 vs 0.96, p=0.88), and outperformed the other structural measurements: mRNFL (0.91, p=0.002), mGCL (0.92, p=0.02) and mIPL (0.92, p=0.0001).ConclusionsPCA identified a diffuse representation of the papillary and macular SD-OCT parameters as the most important PC to summarise structural data in healthy and glaucomatous eyes. PCs and pRNFL parameters showed the greatest discriminative ability between healthy and glaucoma cases.

scholarly journals Effect of Active and Passive Smoking on Retinal Nerve Fibre Layer and Ganglion Cell Complex

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Amany Abd El-Fattah El-Shazly ◽  
Yousra Ahmed Thabet Farweez ◽  
Lamia Salah Elewa ◽  
Yasser Abdelmageuid Elzankalony ◽  
Botheina Ahmed Thabet Farweez
Keyword(s):  
Ganglion Cell ◽  
Nerve Fibre ◽  
Retinal Nerve Fibre Layer ◽  
Cell Complex ◽  
Ganglion Cell Complex ◽  
Urinary Cotinine ◽  
Fibre Layer ◽  
Significant Difference ◽  
Nerve Fibre Layer ◽  
Sd Oct

Aim.To evaluate the possible structural and functional changes in the retinal nerve fibre layer (RNFL) and the ganglion cell complex (GCC) of chronic smokers and compare them with those of passive healthy smokers using spectral domain optical coherence tomography (SD-OCT) and pattern electroretinogram (PERG).Materials and Methods. We include 80 active chronic smokers and 80 age- and sex-matched healthy passive smokers. After a full ophthalmological examination, SD-OCT and PERG were tested for all participants. Urinary levels of cotinine and creatinine with subsequent calculation of the cotinine creatinine ratio (CCR).Results. Inferior and superior quadrants of RNFL were thinner in group I, but nasal and temporal quadrants did not show significant difference between the groups. There were no significant differences of GCC values between the two groups. There was no significant difference of PERG-P50 amplitude and latency; however, PERG-N95 showed significant difference between the two groups. Multiple regression analyses demonstrated that the number of cigarettes/day, urinary cotinine, and PERG-N95 amplitude are the most important determinants for both superior and inferior RNFL thicknesses.Conclusion. RNFL thickness decreases in chronic, healthy, heavy cigarette smokers, and this thinning is related to the number of cigarettes/day, urinary cotinine, and PERG-N95 latency and amplitude.

scholarly journals Retinal nerve fibre layer and ganglion cell complex thickness in patients with keratoconus

2018 ◽  
Vol 77 (1) ◽  
Author(s):  
Prianka Cuppusamy ◽  
Nokwanda Makhanya ◽  
Mbekezeli Methula ◽  
Kausar M. Essop ◽  
Duduzile Sibisi ◽  
...  
Keyword(s):  
Ganglion Cell ◽  
Nerve Fibre ◽  
Retinal Nerve Fibre Layer ◽  
Cell Complex ◽  
Control Group ◽  
Ganglion Cell Complex ◽  
Equal Distribution ◽  
Fibre Layer ◽  
The Mean ◽  
Nerve Fibre Layer

Background: Keratoconus, a corneal ectasia, is associated with corneal thinning and altered optical media. Consequently, assessment of the visual field, optic nerve head and intraocular pressure measurements may be challenging in patients with keratoconus. Few studies have investigated posterior segment variables including the retinal nerve fibre layer (RNFL) and ganglion cell complex (GCC) thickness in patients with keratoconus.Aim: To investigate RNFL and GCC thickness in patients with keratoconus.Methods: A comparative quantitative research design was used. The sample consisted of 56 participants (28 with mild, moderate or severe keratoconus, and 28 controls) who accessed the optometry clinic at the University of KwaZulu-Natal. There was an equal distribution of male (n = 14) and female (n = 14) participants in the keratoconus and control groups. Most participants were black (n = 34) or Indian (n = 18). Corneal power and refractive error were assessed with the Oculus Keratograph and subjective refraction respectively. The iVue-100 optical coherence topography device was used to measure RNFL and GCC thickness. Data were analysed by descriptive and inferential statistics.Results: The mean global RNFL thickness was slightly higher in the control group than the keratoconus group for the right (106 µm vs. 99 µm) and left (103 µm vs. 98 µm) eyes but these differences were not significant (p ≥ 0.057). For all RNFL quadrants, slightly lower mean RNFL measurements were found in the keratoconus group. The mean GCC thicknesses were marginally higher (3 µm – 6 µm) in the control group.Conclusion: The RNFL and GCC thickness differences between patients with keratoconus and controls are not clinically significant. Therefore, abnormally reduced RNFL and GCC thickness measurements in patients with keratoconus warrant further investigation for other pathologies specifically glaucoma.

The Applicability of Ganglion Cell Complex Parameters Determined From SD-OCT Images to Detect Glaucomatous Eyes

2013 ◽  
Vol 22 (9) ◽  
pp. 713-718 ◽  
Author(s):  
Paramastri Arintawati ◽  
Takashi Sone ◽  
Tomoyuki Akita ◽  
Junko Tanaka ◽  
Yoshiaki Kiuchi
Keyword(s):  
Ganglion Cell ◽  
Cell Complex ◽  
Ganglion Cell Complex ◽  
Sd Oct

scholarly journals Choroidal Thickness and Ganglion Cell Complex in Pubescent Children with Type 1 Diabetes without Diabetic Retinopathy Analyzed by Spectral Domain Optical Coherence Tomography

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Joanna Gołębiewska ◽  
Andrzej Olechowski ◽  
Marta Wysocka-Mincewicz ◽  
Marta Baszyńska-Wilk ◽  
Artur Groszek ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Type 1 Diabetes ◽  
Ganglion Cell ◽  
Hba1c Level ◽  
Choroidal Thickness ◽  
Cell Complex ◽  
Ganglion Cell Complex ◽  
Significant Difference ◽  
Sd Oct

Aim. To assess the retinal and choroidal thickness and ganglion cell complex (GCC) in pubescent children with type 1 diabetes (T1D) without diabetic retinopathy (DR), using spectral domain optical coherence tomography (SD-OCT). Materials and Method. Sixty-four right eyes of 64 subjects with T1D and 45 right eyes of 45 age-matched healthy volunteers (control group) were enrolled in this study. The mean age of the subjects and controls was 15.3 (±SD = 2.2) and 14.6 (±SD = 1.5), respectively. SD-OCT was performed using RTVue XR Avanti. Ganglion cell complex (GCC), GCC focal loss volume (FLV), GCC global loss volume (GLV), choroidal thickness (CT), foveal (FT) and parafoveal thickness (PFT), and foveal (FV) and parafoveal volume (PFV) data were analyzed. Results. There was no significant difference between subjects and controls in the CT in the fovea and nasal, temporal, superior, and inferior quadrants of the macula. There were no significant correlations between CT, duration of diabetes, and HbA1C level (p=0.272 and p=0.197, resp.). GCC thickness did not differ significantly between the groups (p=0.448), but there was a significant difference in FLV (p=0.037). Significant differences between the groups were found in the PFT and PFV (p=0.004 and p=0.005, resp.). There was a significant negative correlation between PFT, PFV, and HbA1C level (p=0.002 and p=0.001, resp.). Conclusions. Choroidal thickness remains unchanged in children with T1D. Increased GCC FLV might suggest an early alteration in neuroretinal tissue. Parafoveal retinal thickness is decreased in pubescent T1D children and correlates with HbA1C level. OCT can be considered a part of noninvasive screening in children with T1D and a tool for early detection of retinal and choroidal abnormalities. Further OCT follow-up is needed to determine whether any of the discussed OCT measurements are predictive of future DR severity.

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