Optical Coherence Tomography In Patients Research Articles

Correspondence on ‘Detection and Correlation of Changes on Perimetry and Optical Coherence Tomography in Patients on Chronic Usage of Hydroxychloroquine: A Cross-sectional Study’

Correspondence on ‘Detection and Correlation of Changes on Perimetry and Optical Coherence Tomography in Patients on Chronic Usage of Hydroxychloroquine: A Cross-sectional Study’

Hidden vulnerable plaques make the most noise: optical coherence tomography in patients with ST segment elevation myocardial infarction and multivessel disease.

Hidden vulnerable plaques make the most noise: optical coherence tomography in patients with ST segment elevation myocardial infarction and multivessel disease.

Макулярные телеангиэктазии 2-го типа

Purpose. To summarize the data on the etiology, pathogenesis, diagnostic methods, and treatment of macular telangiectasia type 2 (MacTel 2) currently known. Material and methods. For this review, a search was conducted on PubMed and eLIBRARY resources, covering scientific publications by domestic and foreign authors from 1980 to 2021. The primary focus of the search was on the topic of MacTel 2. Results. Based on the current understanding of the disease process, it is recognized that dysfunction or loss of Muller cells represents an early stage that contributes to the development of MacTel 2. The review addresses the issues of diagnosis and differential diagnosis, pathogenesis, classification, clinical presentation, and treatment of MacTel 2. Detailed discussion is provided on the changes detected by optical coherence tomography in patients with MacTel 2, which can be valuable for the differential diagnosis of this condition and selection of appropriate patient management strategies. Conclusion. The emergence of new technologies enables the identification of specific changes occurring in the retina in MacTel 2, which require detailed analysis and can be used for differential diagnosis and disease prognosis. Key words: macular telangiectasia type 2, retinal degenerative disease, Muller cells, optical coherence tomography, differential diagnosis

Plaque Morphology by Optical Coherence Tomography in Patients Undergoing Percutaneous Coronary Intervention for Saphenous Vein Graft Lesions: A Prospective Observational Pilot study

Plaque Morphology by Optical Coherence Tomography in Patients Undergoing Percutaneous Coronary Intervention for Saphenous Vein Graft Lesions: A Prospective Observational Pilot study

Choroidal vascularity index and choroidal thickness assessment in vitiligo

ABSTRACT Clinical relevance Vitiligo is a skin disease characterised by depigmentation and loss of melanocytes. Melanocyte loss may not be limited to the skin in vitiligo, and various abnormalities may occur in the choroid, which is dense in melanocytes. Background To evaluate structural changes in the choroid by measuring choroidal thickness and vascularity index using optical coherence tomography in patients with vitiligo and comparing them to healthy subjects. Methods This study included 168 participants: 84 with vitiligo (30 females, 54 males) and 84 controls (36 females, 48 males). Choroidal thickness and vascularity index were measured using the enhanced depth imaging mode in spectral-domain optical coherence tomography. The choroidal thickness was measured at the following five points; subfoveal (SF), 500 μm (NCT1) and 1000 μm (NCT2) nasal to the fovea; and 500 μm (TCT1) and 1000 μm (TCT2) temporal to the fovea. The choroidal vascularity index was calculated using the ImageJ software. Results SF (p < 0.001), NCT1 (p < 0.001), NCT2 (p = 0.021), TCT1 (p = 0.001), and TCT2 (p < 0.006) choroidal thicknesses were significantly smaller in the vitiligo group than in the control group. Total choroidal (p < 0.001) and stromal (p < 0.001) areas were significantly smaller in the vitiligo group than in the control group. Choroidal vascularity indices were significantly higher in the vitiligo group than in the control group (p < 0.001). However, luminal areas did not differ significantly between groups (p = 0.935). Conclusion Patients with vitiligo should be regularly monitored for choroidal alterations and, if necessary, referred to an ophthalmologist.

Evaluation of the retinal nerve fiber layer and choroidal thickness with optical coherence tomography in patients with psoriasis

BackgroundTo evaluate the retinal nerve fiber layer (RNFL), central retinal thickness (CRT), and choroidal thickness (CT) in patients with psoriasis. MethodsThe study included 43 patients diagnosed with psoriasis not receiving systemic treatment and 41 healthy volunteers. Spectral domain optical coherence tomography was used for retinal and choroidal thickness measurements. The mean RNFL, quadrant RNFL (superior, inferior, nasal, temporal), and CRT values were recorded. The choroidal thickness measurements were taken from the subfoveal area, towards the temporal and nasal directions from the fovea at distances of 500, 1000, and 1500 µm. ResultsThe RNFL was determined to be thinner in the superior quadrant (p=0.025), and the CT was thicker at all the measurement points (p < 0.05) in the patients with psoriasis. The CRT values were similar in both groups (p > 0.05). No correlation was determined between the parameters measured and disease duration or severity. ConclusionsThinning of the RNFL and increased CT may be a sign of choroidal microvascular changes and ganglion cell damage due to psoriasis.

TCT-343 Prognostic Impact of Morpho-Functional Assessment With Quantitative Flow Ratio and Optical Coherence Tomography in Patients With Acute Coronary Syndromes

TCT-343 Prognostic Impact of Morpho-Functional Assessment With Quantitative Flow Ratio and Optical Coherence Tomography in Patients With Acute Coronary Syndromes

Evaluation of retinal thickness measured by optical coherence tomography in patients with generalized anxiety disorder

PurposeTo compare the peripapillary retinal nerve fiber layer thickness, macular thickness, ganglion cell layer thickness, and inner plexiform layer thickness determined by Optic Coherence Tomography in the patient group diagnosed with a generalized anxiety disorder who did not receive any psychiatric medication with the healthy control group. MethodsForty newly diagnosed, drug-free Generalized Anxiety Disorder patients and 43 healthy age- and gender-matched control subjects were included in the study. Macular thickness, ganglion cell layer thickness, inner plexiform layer thickness, and peripapillary retinal nerve fiber layer thickness were measured using optical coherence tomography. Structured Clinical Interviews and a State-Trait Anxiety Scale were applied to both groups. ResultsGender distributions (P = 0.965) and mean ages were similar between the groups (P = 0.340). Retinal nerve fiber layer thickness measurements were not significantly different between the groups. We observed statistically significant thinning in the inner superior, inner nasal, inner temporal, inner inferior, and outer inferior quadrants of the macula in the patient group compared to the control group (P = 0.046, P = 0.046, P = 0.020, P = 0.007, P = 0.014). We found thinning at the Ganglion cell layer in the inner inferior and outer temporal quadrants (Respectively P = 0.018, P = 0.049), inner plexiform layer in the inner nasal, inner temporal, and inner inferior quadrants (Respectively P = 0.046, P = 0.044, P = 0.011) compared to the control group. ConclusionsThis is the first study to reveal thinning in the macula, ganglion cell layer, and inner plexiform layer in newly diagnosed, drug-free Generalized Anxiety Disorder patients compared to the control group.

Early Detection of Optic Nerve Changes on Optical Coherence Tomography Using Deep Learning for Risk-Stratification of Papilledema and Glaucoma.

The use of artificial intelligence is becoming more prevalence in medicine with numerous successful examples in ophthalmology. However, much of the work has been focused on replicating the works of ophthalmologists. Given the analytical potentials of artificial intelligence, it is plausible that artificial intelligence can detect microfeatures not readily distinguished by humans. In this study, we tested the potential for artificial intelligence to detect early optic coherence tomography changes to predict progression toward papilledema or glaucoma when no significant changes are detected on optical coherence tomography by clinicians. Prediagnostic optical coherence tomography of patients who developed papilledema (n = 93, eyes = 166) and glaucoma (n = 187, eyes = 327) were collected. Given discrepancy in average cup-to-disc ratios of the experimental groups, control groups for papilledema (n = 254, eyes = 379) and glaucoma (n = 441, eyes = 739) are matched by cup-to-disc ratio. Publicly available Visual Geometry Group-19 model is retrained using each experimental group and its respective control group to predict progression to papilledema or glaucoma. Images used for training include retinal nerve fiber layer thickness map, extracted vertical tomogram, ganglion cell thickness map, and ILM-RPE thickness map. Trained model was able to predict progression to papilledema with a precision of 0.714 and a recall of 0.769 when trained with retinal nerve fiber layer thickness map, but not other image types. However, trained model was able to predict progression to glaucoma with a precision of 0.682 and recall of 0.857 when trained with extracted vertical tomogram, but not other image types. Area under precision-recall curve of 0.826 and 0.785 were achieved for papilledema and glaucoma models, respectively. Computational and analytical power of computers have become an invaluable part of our lives and research endeavors. Our proof-of-concept study showed that artificial intelligence (AI) algorithms have the potential to detect early changes on optical coherence tomography for prediction of progression that is not readily observed by clinicians. Further research may help establish possible AI models that can assist with early diagnosis or risk stratification in ophthalmology.

OPTICAL COHERENCE TOMOGRAPHY CHARACTERISTICS OVER TIME IN BEHÇET'S UVEITIS.

To analyze the characteristics of macular optical coherence tomography in patients with Behçet's uveitis (BU). Retrospectively analyzing optical coherence tomography images and clinical data of patients with Behçet's uveitis who visited our hospital from January 2010 to July 2022. One hundred and one patients (174 eyes) were included. We analyzed the development of optical coherence tomography changes in these patients and its relationship with acuity vision and found that cystic macular edema, hyperreflexive retinal spots, inner nuclear layer edema, and outer nuclear layer edema appeared at any time during the disease course. Epiretinal membranes appeared beginning 1 to 2 weeks after onset and worsened over time, and foveal atrophy occurred beginning at 2 to 4 weeks. Foveal atrophy, foveal layers disappear, ellipsoid zone (EZ) disruption, retinal pigment epithelium (RPE) disruption, RPE hyperreflection, and choroidal hyperreflection were correlated with visual acuity. Kaplan‒Meier survival analysis showed at 60 months of follow-up, and almost all patients with foveal atrophy, EZ disruption, RPE disruption, RPE hyperreflection, and choroidal hyperreflection had visual acuity less than logMAR 1.0. EZ disruption and RPE disruption were reversible with aggressive treatment from 4 to 12 months after onset, but was less recoverable after 2 years. In advanced stages, optical coherence tomography manifested as structural disturbances and atrophy of the macular area, highly reflective material deposition in the RPE layer, and a thick macular epimembrane. Optical coherence tomography showed that severe lesions occurred in macula of patients with Behçet's uveitis in early stage. Aggressive treatment can partially reverse it.

Utility of optical coherence tomography in patients of central immune mediated demyelinating diseases - A prospective study.

Optical coherence tomography (OCT) is a non-invasive tool to measure thickness of various layers of retina. Recently, retinal nerve fibre layer (RNFL) and ganglion cell and inner plexiform layer (GCIP) thinning has been observed in OCT in patients with multiple sclerosis (MS) and neuromyelitis optica spectrum disorder (NMOSD), This study compared OCT profile, along with visual acuity (VA), color vision (CV), contrast saturation (CS) and visual evoked potentials (VEP) in two main cohorts of MS and NMOSD and with controls, during acute episode of optic neuritis (ON), at 3 and 6months. We found that changes of ON were present in 75% of MS eyes and in 45% of NMOSD patients. Of these, subclinical involvement was present in 56.25% of MS eyes and only in 5% of NMOSD eyes suggesting frequent subclinical involvement in the former. Mean RNFL was 95.23±15.53 in MS and 66.14±43.73 in NMOSD after 6months of ON episode. Thinning of NQ and IQ was observed in NMOSD eyes in the immediate period after ON attack. At 6months relative sparing of RNFL in TQ was observed in NMOSD ON eyes and MS ON showed predilection for involvement of TQ.

Сравнительный анализ аваскулярных отслоек ретинального пигментного эпителия

Purpose. To study anatomical and functional parameters using optical coherence tomography in patients with avascular retinal pigment epithelium (RPE) detachment with age-related macular degeneration (AMD) and central serous chorioretinopathy (CSCR). Material and methods. 40 people with AMD and CSR were examined. Patients were divided depending on the type of RPE detachment: druzenoid – 10 patients, serous RPE detachment in AMD – 20 patients, serous RPE detachment in CSCR – 10 patients. Results. A comparative analysis revealed that serous avascular RPE detachment in AMD is characterized by the greatest height and width in relation to drusenoid RPE detachment and RPE detachment in CSCR. Avascular RPE detachment in CSCR are characterized by the smallest dimensions – both in height and width in relation to other avascular RPE detachments, and the greatest thickness of the choroid in relation to serous RPE detachment in AMD (p = 0.018). Conclusions. The identified features of avascular RPE detachment in AMD and CSCR allow us to choose an adequate tactics for managing patients. Key words: retinal pigment epithelium detachment, age-related macular degeneration, central serous chorioretinopathy

Predisposing characteristics of optical coherence tomography for patients with persistent subretinal fluid after successful repair of rhegmatogenous retinal detachment.

To investigate the predisposing clinical parameters and characteristics of fundus imaging of patients with persistent subretinal fluid (PSF) after successful repair of rhegmatogenous retinal detachment. A retrospective study recruiting 57 patients was conducted. All patients underwent pars plana vitrectomy with silicone oil tamponade. Patients were divided into two groups: patients presenting PSF by the time of silicone oil removal (PSF group), and patients presenting no PSF by the time of silicone oil removal as control group. All patients were followed up for three months or longer after primary surgery. Ophthalmic examinations, including fundus photography and optical coherence tomography (OCT) were performed. There were significant differences between the two groups in terms of average age, durations of preoperative symptoms, and type of retinal breaks (P<0.05). These clinical parameters showed statistical correlations with PSF (P<0.05). The proportions of patients presenting distinctive boundaries of the detached retina on fundus photograph and patients showing a hyperreflective line underlying the detached retina on OCT in the PSF group were both significantly higher than the control group (P<0.05). The macular detachment heights on OCT in PSF group were significantly lower than control group (P<0.05). These imaging characteristics also showed strong correlations with PSF (P<0.05). This study suggests that patients with PSF have younger age, longer symptom duration, and higher incidence of retinal holes. The distinctive detachment boundary on fundus photograph, lower macular detachment height, and hyperreflective line underlying detached retina on OCT may be the predisposing characteristics of PSF.

Optical coherence tomography in patients with Wilson's disease.

Morphological changes of retina in patients with Wilson's disease (WD) can be found by optical coherence tomography (OCT), and such changes had significant differences between neurological forms (NWD) and hepatic forms (HWD) of WD. The aim of this study was to evaluate the relationship between morphological parameters of retina and brain magnetic resonance imaging (MRI) lesions, course of disease, type of disease, and sexuality in WD. A total of 46 WD patients and 40 health controls (HC) were recruited in this study. A total of 42 WD patients were divided into different groups according to clinical manifestations, course of disease, sexuality, and brain MRI lesions. We employed the Global Assessment Scale to assess neurological severity of WD patients. All WD patients and HC underwent retinal OCT to assess the thickness of inner limiting membrane (ILM) layer to retinal pigment epithelium layer and inner retina layer (ILM to inner plexiform layer, ILM-IPL). Compared to HWD, NWD had thinner superior parafovea zone (108.07±6.89 vs. 114.40±5.54μm, p<.01), temporal parafovea zone (97.17±6.65 vs. 103.60±4.53μm, p<.01), inferior parafovea zone (108.114±7.65 vs. 114.93±5.84μm, p<.01), and nasal parafovea zone (105.53±8.01 vs. 112.10±5.44 μm, p<.01) in inner retina layer. Course of disease influenced the retina thickness. Male patients had thinner inner retina layer compared to female patients. Our results demonstrated that WD had thinner inner retina layer compared to HC, and NWD had thinner inner retina layer compared to HWD. We speculated the thickness of inner retina layer may be a potential useful biomarker for NWD.

Investigation of the Relationship Between Cognitive Functions and Retinal Findings From Spectral Optical Coherence Tomography in Patients With Schizophrenia and Their Healthy Siblings.

Retinal structural changes which were investigated by optical coherence tomography (OCT) have been reported in schizophrenia. Since cognitive dysfunction is a core feature of schizophrenia, the correlations between retinal findings and cognitive functions of patients and their healthy siblings may provide insight into the pathophysiological processes of the disorder. We aimed to investigate the relationship between neuropsychiatric tests and retinal changes in schizophrenia patients and their healthy siblings. We measured OCT parameters and cognitive performance (via Trail Making Tests, verbal fluency tests, and The Digit Span Tests) of 72 participants (36 patients with schizophrenia and 36 healthy siblings) and disease severity (with Positive and Negative Syndrome Scale, Global Assessment of Functioning, and Clinical Global Impression scales) in patients with schizophrenia and evaluated the relationship between retinal findings and clinical parameters, especially neurocognitive tests. We found decreased ganglion cell layer-inner plexiform layer thickness and macular volume in the patient group. There were strong correlations between neurocognitive tests and OCT findings in both groups. On the other hand, there was not any correlation between retinal findings and disease parameters. The cognitive symptoms of schizophrenia may be more closely related to structural changes in the retina.

Correlación entre la sensibilidad al contraste y las características morfológicas obtenidas por OCT en pacientes con degeneración macular relacionada con la edad avanzada tratados con dosis de carga de inhibidores del factor de crecimiento endotelial vascular

ObjectiveTo determine the correlation between contrast sensitivity and morphological characteristics obtained by optical coherence tomography in patients with age-related macular degeneration treated with a loading dose of vascular endothelial growth factor inhibitors (anti-VEGF). DesignThis is an ambispective (prospective+retrospective) observational, cross-sectional, and analytical study. ParticipantsAll patients over 55 years of age with age-related macular degeneration who attended the Retina service of the Ophthalmology department and met the inclusion criteria between March-May 2022. MethodsData collection was carried out by reviewing the records of patients.Optical coherence tomography studies prior to the application of intravitreal injections of patients who were currently in the first month after the last dose of anti-VEGF were analyzed. A total of 33 subjects were included, of which 30 continued follow-ups. Normality tests (Shapiro and Bartlett) were performed where a nonparametric data distribution was demonstrated. The subjects underwent a new ophthalmological evaluation and new retinal measurements of the affected eye. ResultsA linear regression analysis was performed comparing the logarithmic values of both visual acuity and contrast sensitivity, obtaining a significant relationship between both values after the application of treatment (P<.0001). Likewise, correlation was demonstrated between the decrease in contrast sensitivity values and all the characteristics evaluated in the patients’ optical coherence tomography. ConclusionsAntiangiogenesis strategies can lead to better results in global visual function, positively impacting contrast sensitivity.

Randomized comparison of 9-month stent strut coverage of biolimus and everolimus drug-eluting stents assessed by optical coherence tomography in patients with ST-segment elevation myocardial infarction. Long-term (5-years) clinical follow-up (ROBUST trial).

The aim of the study was to compare healing (assessed by optical coherence tomography [OCT]) of biolimus A9 (BES) and everolimus drug-eluting stents (EES) at 9-month follow-up in patients with ST-segment elevation myocardial infarction (STEMI) treated by primary percutaneous coronary intervention (pPCI). Nine-month clinical and angiographic data were also compared in both groups as well as clinical data at 5 years of follow-up. A total of 201 patients with STEMI were enrolled in the study and randomized either to pPCI with BES or EES implantation. All patients were scheduled for 9 months of angiographic and OCT follow-up. The rate of major adverse cardiovascular events (MACE) was comparable at 9 months in both groups (5% in BES vs. 6% in the EES group; p = 0.87). Angiographic data were also comparable between both groups. The main finding at 9-month OCT analysis was the greatly reduced extent of mean neointimal area at the cost of a higher proportion of uncovered struts in the BES group (1.3 mm² vs. 0.9 mm²; p = 0.0001 and 15.9% vs. 7.0%; p = 0.0001, respectively). At 5 years of clinical follow-up the rate of MACE was comparable between both groups (16.8% vs. 14.0%, p = 0.74). The study demonstrates a very low rate of MACE and good 9-month stent strut coverage of second-generation BES and EES in patients with STEMI. BES showed greatly reduced extent of mean neointimal hyperplasia area at the cost of a higher proportion of uncovered struts when compared to EES. The rate of MACE was low and comparable in both groups at 5 years.

Assessment of macular and peripapillary choroidal thickness in non-arteritic anterior ischemic optic neuropathy: A meta-analysis

Non-arteritic anterior ischemic optic neuropathy (NAION) is the most common optic neuropathy in adults aged ≥ 50 years. Transient non-perfusion or hypoperfusion of the optic nerve head circulation is believed to be the underlying cause of NAION. It has been suggested that peripapillary choroidal thickness (PCT) is altered after ischemic disorders of the optic nerve head, but the results have not always been consistent. To address this issue and provide evidence for the pathogenesis of NAION, we performed a meta-analysis to systematically evaluate macular choroidal thickness (MCT) and PCT in patients with NAION. A comprehensive literature search of PubMed, Embase, Cochrane Library, and Web of Science databases was performed until August 31, 2022. The main inclusion criterion was a case-control study in which MCT and PCT were measured using optical coherence tomography in patients with NAION. Mean difference (MD) and 95% confidence interval were calculated for continuous estimates. The Review Manager (V5.40) was used for the analysis. Nine studies comprising 663 eyes (283 NAION eyes and 380 healthy control eyes) were included (Newcastle-Ottawa Scale score ≥ 5). MCT and PCT were higher in eyes with chronic NAION (MD = 19.16, P = .04; MD = 35.36, P < .00001) and NAION fellow eyes (MD = 30.35, P = .0006; MD = 29.86, P = .04) than in healthy controls. No difference was noted in the MCT between eyes with acute NAION and healthy controls (MD = 2.99, P = .87). Increased MCT and PCT may be important anatomical and physiological features of the eyes in patients with NAION.

Association between Aqueous Humor Cytokines and Structural Characteristics Based on Optical Coherence Tomography in Patients with Diabetic Macular Edema.

To investigate the relationship between aqueous humor cytokines and structural characteristics based on optical coherence tomography (OCT) in patients with diabetic macular edema (DME). Forty eyes of 28 patients with DME diagnosed in the Affiliated Eye Hospital of Wenzhou Medical University at Hangzhou were included. All patients collected aqueous humor during anti-VEGF treatment, and the IL-6, IL-8, IL-10, VEGF, VCAM-1, ICAM-1, TGF-β1, FGF, and MCP-1 concentrations were detected. OCT examination was performed before anti-VEGF treatment and 1 month after anti-VEGF operation. Central macular thickness (CMT), macular volume (MV), choroidal thickness (CT), and the number of hyperreflective foci (HRF) were obtained for analysis. Each eye was determined whether there is subretinal effusion (SRD), cystoid macular edema (CME), and diffuse retinal thickening (DRT). The levels of IL-6 and FGF in DME patients with SRD were significantly higher than those without SRD (all P < 0.05). The level of VEGF in DME patients with CME was significantly higher than that in DME patients without CME (P = 0.005); IL-6, TGF-β1, and MCP-1 were significantly higher in DME patients with DRT than that without DRT (all P < 0.05). There was no significant correlation between aqueous humor cytokines and retinal thickness and retinal volume. However, the thinner the CT, the higher the level of aqueous humor cytokines IL-6 (r = -0.313, P = 0.049) and FGF (r = -0.361, P = 0.022). A multivariate linear regression analysis showed that IL-6 was significantly correlated with CT (P = 0.002) and SRD (P = 0.017), FGF was also significantly correlated with CT (P = 0.002) and SRD (P = 0.005), and TGF-β1 was correlated with triglycerides (P = 0.030) and HRF (P = 0.021). DME patients with significant macular cystoid edema changes may be related to high VEGF concentrations and thin CT; meanwhile, the presence of SRD or a high number of HRF on OCT macular scans in DME patients may indicate high levels of intraocular inflammatory factors. Thus, OCT morphology characteristics to some extent reflect intraocular inflammatory factors and VEGF levels and may guide treatment alternatives.

Compare Mean Central Corneal Thickness with Ultrasound Pachymetry and Spectral-Domain Optical Coherence Tomography in Patients Presenting with Glaucoma

Background: The optic nerve damage with the ultimate loss of vision resulting from a clutch of diseases named Glaucoma. In many conditions including, corneal dystrophies, corneal edema, and endothelial diseases of the cornea, the important biometric is Central corneal thickness (CCT). Objective: To find the difference in mean CCT with spectral-domain optical coherence tomography and ultrasound pachymetry in patients presenting with Glaucoma. Material &amp; Methods: The study design opted was the observational cross-section. The study was done in tertiary care hospital. A total of 180 patients were registered for the present study. Both techniques noted the CCT value of all patients. Once the data was collected, it was stored electronically and analyzed by using SPSS version 20.0. Results: 40.00±11.50 years was the average age of all the patients. There were 89(49.44%) males and 91(50.56%) females. The mean CCT was 531.01±28.54µm on OCT and 530.01±29.74µm on USP. The mean difference in CCT was 3.93±3.13µm between OCT &amp; USP. The difference was statistically insignificant (p&lt;0.05). Conclusion: There is a statistically insignificant difference between the mean CCT with USP and spectral domain OCT patients presenting with Glaucoma. Keywords: Glaucoma, Optical Coherence Tomography, Central Corneal Thickness.