Automated Detection of the Foveal Center Improves SD-OCT Measurements of Central Retinal Thickness

Purpose: To find the effectiveness of sub-threshold (810nm) micropulse diode laser treatment (SMT) in chronic central serous retinopathy (CSR). Study Design: Interventional case series. Place and Duration of Study: Layton Rahmatulla benevolent trust eye hospital, from April 2019 to July 2020. Methods: The patients of chronic CSR (≥ 6 months) participated in the study. We used Spectral Domain Optical coherence tomography (SD-OCT) to record baseline central retinal thickness (CT). Best corrected visual acuity (BCVA) was recorded with Snellen’s chart and converted to Log MAR for statistical analysis. All patients underwent treatment with sub-threshold laser (810nm) in micropulse mode with 5% duty cycle (DC). Results: Twenty five eyes with chronic CSR were enrolled in the study. The patients were treated with laser and final assessment was made at 6 months. Mean BCVA at presentation was 0.46 Log MAR ± 0.12 and a mean baseline CT of 362.2 μm ± 32.6µm. At final follow-up there was a mean decrease in CT of 97.2 μm ± 21.8 from the baseline. After treatment mean BCVA was 0.33 Log MAR ± 0.12 and mean CT was 266 μm ± 20.9. Nineteen out of twenty-five eyes (76%) achieved a gain of vision between 1 to 3 lines and gain of 3 lines was achieved in 8% of cases. At the final follow-up there was incomplete resolution of sub retinal fluid in 4 eyes (16%) with no improvement in BCVA. Conclusion: SMT (810 nm) is an effective and minimally invasive treatment modality for chronic CSR. Key Words: Sub-Threshold micropulse laser, Central serous retinopathy, Central retinal thickness, sub retinal fluid.

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Association between central retinal thickness and low luminance visual acuity in early age-related macular degeneration

European Journal of Ophthalmology ◽

10.1177/1120672120968740 ◽

2020 ◽

pp. 112067212096874

Author(s):

María Cinta Puell ◽

Francisco Javier Hurtado-Ceña ◽

María Jesús Pérez-Carrasco ◽

Inés Contreras

Keyword(s):

Visual Acuity ◽

Macular Degeneration ◽

Retinal Thickness ◽

Central Area ◽

Age Related Macular Degeneration ◽

Central Retinal Thickness ◽

Cross Sectional ◽

Age Related ◽

Low Luminance ◽

Sd Oct

Purpose/Aim: To examine whether central retinal thickness (CRT) is related to mesopic visual acuity (VA) and low luminance deficit (LLD, difference between photopic and mesopic VA) in eyes with early and intermediate age-related macular degeneration (AMD). Materials and Methods: In a cross-sectional study, 50 pseudophakic subjects older than 63 years were divided into three groups (no AMD, early AMD and intermediate AMD). Spectral domain optical coherence tomography (SD-OCT) was used to measure CRT in the 1 mm-central-area. Best-corrected distance VA was measured under photopic or mesopic luminance conditions and LLD calculated. Subjects were stratified by VA impairment to compare CRTs across these groups. Relationships were examined by stepwise multiple linear regression. Results: No significant differences in mean CRT, photopic and mesopic VA or LLD were detected between the groups no AMD, early AMD and intermediate AMD. However, mean CRTs were 20 microns and 18 microns thicker in the eyes with impaired mesopic VA (> 0.3 logMAR) and impaired LLD (⩾ 0.3 logMAR) compared to the eyes with non-impaired VA or LLD respectively (both p < 0.01). CRT and mesopic pupil size were independent predictors of mesopic VA ( p = 0.001). CRT emerged as the only independent predictor of LLD ( p = 0.004). Conclusions: Increased CRT was linked to worse retinal function when measured under mesopic conditions in eyes without AMD and eyes with early to intermediate AMD. SD-OCT imaging combined with VA measurements under low luminance conditions could be a useful tool to detect early AMD.

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Normal Value Ranges for Central Retinal Thickness Asymmetry in Healthy Caucasian Adults Measured by SPECTRALIS SD-OCT Posterior Pole Asymmetry Analysis

Investigative Opthalmology & Visual Science ◽

10.1167/iovs.14-15663 ◽

2015 ◽

Vol 56 (6) ◽

pp. 3875 ◽

Cited By ~ 10

Author(s):

Agnes Galbo Jacobsen ◽

Mette Dahl Bendtsen ◽

Henrik Vorum ◽

Martin Bøgsted ◽

Janos Hargitai

Keyword(s):

Retinal Thickness ◽

Posterior Pole ◽

Central Retinal Thickness ◽

Normal Value ◽

Asymmetry Analysis ◽

Pole Asymmetry ◽

Sd Oct

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Morphological Changes in Lamellar Macular Holes According to SD-OCT Examination over a Long Observation Period

Diagnostics ◽

10.3390/diagnostics11071145 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1145

Author(s):

Magdalena Kal ◽

Izabela Chojnowska-Ćwiąkała ◽

Mateusz Winiarczyk ◽

Monika Jasielska ◽

Jerzy Mackiewicz

Keyword(s):

Retinal Thickness ◽

Morphological Changes ◽

Outer Diameter ◽

Corrected Visual Acuity ◽

Macular Holes ◽

Kolmogorov Smirnov ◽

Inner Diameter ◽

Observation Period ◽

Sd Oct

Background: The aim of this study was to evaluate the quantitative morphological changes in lamellar macular holes (LMHs) based on SD-OCT examinations and to assess the correlations among minimal retinal thickness (MRT), reading vision (RV), and best corrected visual acuity (BCVA) over a 36-month follow-up period. Methods: A group of 40 patients (44 eyes) with LMH was evaluated, with an average age of 69.87 (SD = 10.14). The quantitative parameters monitored in the follow-up period (at 0, 3, 6, 12, 18, 24, 30, and 36 months) were tested for normality of distribution by Shapiro–Wilk and Kolmogorov–Smirnov tests. Results: The RV and BCVA values were stable, and no significant changes were found at any of the check-ups during the 36-month follow-up period (BCVA p = 0.435 and RV p = 0.0999). The analysis of individual quantitative LMH parameters during the 36-month follow-up period did not demonstrate statistically significant differences: MRT (p = 0.461), Max RT temporal (p = 0.051), Max RT nasal (p = 0.364), inner diameter (ID) (p = 0.089), and outer diameter (OD) (p = 0.985). Conclusions: The observations at 0, 6, 12, 18, 24, 30, and 36 months revealed moderate and significant correlations between RV and MRT. No significant correlation between BCVA and MRT was observed.

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Macular pigment optical density in central serous chorioretinopathy

Therapeutic Advances in Ophthalmology ◽

10.1177/2515841421997195 ◽

2021 ◽

Vol 13 ◽

pp. 251584142199719

Author(s):

Burcu Polat Gultekin ◽

Esra Sahli

Keyword(s):

Confidence Interval ◽

Optical Density ◽

Central Serous Chorioretinopathy ◽

Choroidal Thickness ◽

Retinal Thickness ◽

Macular Pigment ◽

Central Retinal Thickness ◽

Macular Pigment Optical Density ◽

Chronic Central Serous Chorioretinopathy ◽

Acute Central Serous Chorioretinopathy

Purpose: The aim of our study was to evaluate the macular pigment optical density in patients with acute and chronic central serous chorioretinopathy and to describe the association between central retinal thickness and choroidal thickness with the macular pigment optical density. Materials and Methods: Eyes with acute central serous chorioretinopathy and chronic central serous chorioretinopathy (patients, who were diagnosed as having disease activity for 6 months) were included in this study. Macular pigment was measured using the heterochromatic flicker technique of the MPS II device for both eyes in patients with acute and chronic central serous chorioretinopathy and in control subjects. Results: Twenty-seven eyes with acute central serous chorioretinopathy, 23 eyes with chronic central serous chorioretinopathy, and 25 control eyes were enrolled. The mean macular pigment optical density in chronic central serous chorioretinopathy (0.480 ± 0.16 density unit (95% confidence interval: 0.390–0.570) was found to be significantly lower than in the control eyes (0.571 ± 0.128 density unit) (95% confidence interval: 0.480–0.670) ( p = 0.007). In correlation analysis, no significant association was detected between the central retinal thickness, choroidal thickness, and macular pigment optical density values in central serous chorioretinopathy group ( p = 0.31, p = 0.71). Conclusion: Macular pigment optical density levels were significantly lower in chronic central serous chorioretinopathy patients than in controls, possibly due to degeneration of the neurosensorial retina, as a result of the long-term persistence of subretinal fluid. There was not a significant correlation between choroidal thickness and macular pigment optical density levels in central serous chorioretinopathy group.

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Assessment of Global and Local Alterations in Retinal Layer Thickness in Ins2 (Akita) Diabetic Mice by Spectral Domain Optical Coherence Tomography

Journal of Ophthalmology ◽

10.1155/2018/7253498 ◽

2018 ◽

Vol 2018 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Andrew W. Francis ◽

Justin Wanek ◽

Mahnaz Shahidi

Keyword(s):

Optical Coherence Tomography ◽

Mouse Model ◽

Layer Thickness ◽

Retinal Thickness ◽

Normative Values ◽

Retinal Layer ◽

Wild Type ◽

Global And Local ◽

Akita Mice ◽

Sd Oct

Purpose/Aim. The Ins2 (Akita) mouse is a spontaneous diabetic mouse model with a heterozygous mutation in the insulin 2 gene that results in sustained hyperglycemia. The purpose of the study was to assess global and local retinal layer thickness alterations in Akita mice by analysis of spectral domain optical coherence tomography (SD-OCT) images.Materials and Methods. SD-OCT imaging was performed in Akita and wild-type mice at 12 and 24 weeks of age. Inner retinal thickness (IRT), outer retinal thickness (ORT), total retinal thickness (TRT), and photoreceptor outer segment length (OSL) were measured. Mean global thickness values were compared between Akita and wild-type mice. Local thickness variations in Akita mice were assessed based on normative values in wild-type mice.Results. Akita mice had higher blood glucose levels and lower body weights (p<0.001). On average, IRT, ORT, and TRT were approximately 2% lower in Akita mice than in wild-type mice (p≤0.02). In Akita mice, the percent difference between retinal areas with thickness below and above normative values for IRT, ORT, and TRT was 22%, 32%, and 38%, respectively.Conclusions. These findings support the use of the Akita mouse model to study the retinal neurodegenerative effects of hyperglycemia.

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Central retinal thickness fluctuations in patients treated with anti-VEGF for neovascular age related macular degeneration

European Journal of Ophthalmology ◽

10.1177/11206721211037820 ◽

2021 ◽

pp. 112067212110378

Author(s):

Francesco Ciucci ◽

Giuseppina Ioele ◽

Antonio Bardocci ◽

Giorgio Lofoco ◽

Barbara Antonelli ◽

...

Keyword(s):

Macular Degeneration ◽

Retinal Thickness ◽

Treatment Algorithm ◽

Real Life ◽

Principal Component ◽

Age Related Macular Degeneration ◽

Central Retinal Thickness ◽

First Year ◽

Anti Vegf ◽

Age Related

Purpose: This is a retrospective, single-center, non randomized interventional real life study, investigating the correlation between variability of central retinal thickness (CRT) and functional outcomes during 2 years of anti-VEGF therapy in patients treated for neovascular age related macular degeneration (nAMD). Background: CRT fluctuations can depend on various factors such as the correct timing of injections, the therapeutic algorithm, and the number of injections (NI) performed; it is important to understand if CRT fluctuations are responsible for worse visual outcomes and consequently to identify the correct ways to avoid or reduce them. Methods: Forty-one patients were treated for nAMD with aflibercept: 0.5 mg intravitreal aflibercept was administered every 4 weeks during the first 3 months, then bimonthly over the first year, and after the first year adopting a PRN regimen. Standard deviation of CRT (CRT/SD), BCVA, and NI were recorded. Correlation studies were performed by Pearson’s test, Ancova, and Principal Component Analysis. Results: A negative correlation was found between CRT/SD and final BCVA. In patients who lost more than 15 letters, CRT/SD mean was significantly higher in comparison with patients who lost less than 15 letters. Patients with final BCVA >65 letters showed lower CRT/SD values compared to patients with final BCVA ⩽65 letters. Multivariate analysis confirmed that in patients with higher baseline BCVA, improvement of BCVA was correlated to NI, and lower values of CRT fluctuations were observed. Conclusions: CRT fluctuations, even after an appropriate NI given per year, significantly influence BCVA; a proactive treatment algorithm appears crucial when treating patients with nAMD.

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Impact of Baseline Central Retinal Thickness on Outcomes in the VIVID-DME and VISTA-DME Studies

Journal of Ophthalmology ◽

10.1155/2018/3640135 ◽

2018 ◽

Vol 2018 ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

Edoardo Midena ◽

Mark Gillies ◽

Todd A. Katz ◽

Carola Metzig ◽

Chengxing Lu ◽

...

Keyword(s):

Treatment Effect ◽

Retinal Thickness ◽

Continuous Variable ◽

Central Retinal Thickness ◽

Link Type ◽

Intravitreal Aflibercept ◽

Laser Control ◽

Post Hoc ◽

The Impact ◽

Anatomical Outcomes

Purpose. To report the impact of baseline central retinal thickness (CRT) on outcomes in patients with diabetic macular edema (DME) in VIVID-DME and VISTA-DME. Methods. Post hoc analyses of two randomized controlled trials in which 862 DME patients were randomized 1 : 1 : 1 to treatment with intravitreal aflibercept 2.0 mg every 4 weeks (2q4), intravitreal aflibercept 2.0 mg every 8 weeks after five initial monthly doses (2q8), or macular laser photocoagulation at baseline and as needed. We compared visual and anatomical outcomes in subgroups of patients with baseline CRT < 400 μm and ≥400 μm. Results. At weeks 52 and 100, outcomes with intravitreal aflibercept 2q4 and 2q8 were superior to those in laser control-treated patients regardless of baseline CRT. When looked at in a binary fashion, the treatment effect of intravitreal aflibercept versus laser was not significantly better in the ≥400 μm than the <400 μm group; when looked at as a continuous variable, baseline CRT seemed to have an impact on the treatment effect of intravitreal aflibercept versus laser. Conclusions. Post hoc analyses of VIVID-DME and VISTA-DME demonstrated the benefits of intravitreal aflibercept treatment in DME patients with baseline CRT < 400 μm and ≥400 μm. This trial is registered with NCT01331681 and NCT01363440.

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Changes of outer retinal thickness with increasing age in normal eyes

International Eye Research ◽

10.18240/ier.2020.02.08 ◽

2020 ◽

Vol 1 (2) ◽

pp. 108-112

Author(s):

Zi-Jing Li ◽

◽

Jian-Hui Xiao ◽

Peng Zeng ◽

Xiang Gao ◽

...

Keyword(s):

Optical Coherence Tomography ◽

Outer Segment ◽

Retinal Thickness ◽

Pigment Epithelium ◽

Retinal Pigment ◽

Retinal Layer ◽

External Limiting Membrane ◽

The Cost ◽

The Relationship ◽

Sd Oct

AIM: To comprehensively investigate the relationship between outer retinal layer thickness and age in normal eyes. METHODS: One hundred normal eyes of 100 subjects who underwent spectral-domain optical coherence tomography (SD-OCT) were included in this retrospective study. The distances between the external limiting membrane (ELM) line and the photoreceptor inner segment/outer segment (IS/OS) line (ELM-IS/OS), the IS/OS line and the cone outer segment tips (COST) line (IS/OS-COST), the COST line and the retinal pigment epithelium (RPE) complex (COST-RPE) and the full retinal thickness (RT) were measured at the fovea and on four quarters. The relationship between thickness and age or sex was then analysed. CONCLUSION: In normal eyes, the RT thickness on the nasal quarter and the ELM-IS/OS thickness were significantly and negatively correlated with age. The IS/OS-COST and COST-RPE thicknesses were not significantly correlated with age or sex.

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