scholarly journals Influence of segmental supply of Cilioretinal artery on morphology of diabetic macular edema

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Rehana Khan ◽  
Mahesh Shanmugam ◽  
Rajesh Ramanjulu ◽  
Jay Chablani ◽  
Niharika Singh ◽  
...  
Keyword(s):  
Diabetic Retinopathy ◽  
Macular Edema ◽  
Diabetic Macular Edema ◽  
Retinal Thickness ◽  
Central Area ◽  
Fundus Fluorescein Angiography ◽  
Cilioretinal Artery ◽  
Temporal Quadrant ◽  
Retinal Pathologies

Abstract Background The supply of Cilioretinal artery (CRA) to different layers of the retina influences retinal pathologies such as diabetic retinopathy (DR). Since the supply of CRA is segmental, our aim was to analyze the location of CRA with respect to non – center involving diabetic macular edema (DME) differentiated by various segments and center involving DME based on Early Treatment of Diabetic Retinopathy Study (ETDRS) scale using optical coherence tomography (OCT). Methods A retrospective study was conducted in which forty-three patients with various stages of DR and the presence of CRA were identified. Presence and location of CRA was recognized using fundus fluorescein angiography. Classification of DME was based on ETDRS subfields on OCT. Results Evaluation of 26 men and 17 women with varying degrees of severity involving DR revealed the presence of unilateral CRA in 40 subjects and bilateral CRA in 3 subjects. When CRA supplied the central area, maximum retinal thickness was noted at the temporal quadrant (271.67 ± 164.02 μm) along with non - center involving DME (194.87 ± 121.06 μm); when CRA supplied the lower area, maximum retinal thickness was noted at the superior quadrant (293.64 ± 159.36 μm) along with center involving DME (395 ± 285.75 μm) and when it supplied the upper area, maximum retinal thickness was noted at the nasal quadrant (293.49 ± 176.18 μm) along with center involving DME (292 ± 192.79 μm). Conclusion The presence of CRA seems to influence the morphology of the retina amongst patients diagnosed with DR by altering the segments involved in DME based on its supply location. However, further studies with a larger sample size are warranted to strenghten this association.

scholarly journals Influence of Segmental Supply of Cilioretinal Artery on Morphology of Diabetic Macular Edema

2020 ◽  
Author(s):  
Rehana Khan ◽  
Mahesh Shanmugam ◽  
Rajesh Ramanjulu ◽  
Jay Chablani ◽  
Niharika Singh ◽  
...  
Keyword(s):  
Diabetic Retinopathy ◽  
Retrospective Study ◽  
Macular Edema ◽  
Diabetic Macular Edema ◽  
Retinal Thickness ◽  
Central Area ◽  
Fundus Fluorescein Angiography ◽  
Cilioretinal Artery ◽  
Temporal Quadrant ◽  
Retinal Pathologies

Abstract Background: The supply of Cilioretinal artery (CRA) to different layers of retina influences retinal pathologies like diabetic retinopathy. Since the supply of CRA is segmental, Our aim is to analyze the location of CRA) with non center-involving and center-involving diabetic macular edema (DME) and to evaluate the supply of CRA with segments of macular edema based on Early Treatment of Diabetic Retinopathy Study (ETDRS) scale using optical coherence tomography (OCT).Design: Retrospective studyMethods: A retrospective study in which forty-three patients at various stages of diabetic retinopathy with the presence of CRA were identified. Presence and location of CRA was recognized using fundus fluorescein angiography. Classification of DME was based on ETDRS subfields on OCT.Results: Evaluation of 26 men and 17 women of various groups of diabetic retinopathy revealed unilateral CRA in 40 subjects and bilateral CRA in 3 subjects. When CRA supplied the central area, maximum retinal thickness was noted at the temporal quadrant (271.67±164.02 mm) and had non center-involving DME (194.87±121.06 mm), when CRA supplied the lower area, maximum retinal thickness was noted at the superior quadrant (293.64±159.36 mm) and had center-involving DME (395±285.75 mm), and when it supplied the upper area, maximum retinal thickness was noted at the nasal quadrant (293.49±176.18mm) with center-involving DME (292±192.79 mm).Conclusion: The presence of CRA seems to alter the morphology and influences the segment involved in DME. However, further studies with larger sample size are warranted to prove this association.

scholarly journals Influence of Segmental Supply of Cilioretinal Artery on Morphology of Diabetic Macular Edema

2020 ◽  
Author(s):  
Rajiv Raman ◽  
Rehana Khan ◽  
Mahesh Shanmugam ◽  
Rajesh Ramanjulu ◽  
Jay Chablani ◽  
...  
Keyword(s):  
Diabetic Retinopathy ◽  
Retrospective Study ◽  
Macular Edema ◽  
Diabetic Macular Edema ◽  
Retinal Thickness ◽  
Central Area ◽  
Fundus Fluorescein Angiography ◽  
Cilioretinal Artery ◽  
Temporal Quadrant ◽  
Retinal Pathologies

Abstract Background The supply of Cilioretinal artery (CRA) to different layers of retina influences retinal pathologies like diabetic retinopathy. Since the supply of CRA is segmental, Our aim is to analyze the location of CRA) with non center-involving and center-involving diabetic macular edema (DME) and to evaluate the supply of CRA with segments of macular edema based on Early Treatment of Diabetic Retinopathy Study (ETDRS) scale using optical coherence tomography (OCT). Design Retrospective study Methods and Materials A retrospective study in which forty-three patients at various stages of diabetic retinopathy with the presence of CRA were identified. Presence and location of CRA was recognized using fundus fluorescein angiography. Diabetic retinopathy was graded based on ETDRS classification using OCT. Results Evaluation of 26 men and 17 women of various groups of diabetic retinopathy revealed unilateral CRA in 40 subjects and bilateral CRA in 3 subjects. When CRA supplied the central area, maximum retinal thickness was noted at the temporal quadrant (271.67±164.02 μm) and had noncenter-involving DME (194.87±121.06 μm), when CRA supplied the lower area, maximum retinal thickness was noted at the superior quadrant (293.64±159.36 μm) and had center-involving DME (395±285.75 μm), and when it supplied the upper area, maximum retinal thickness was noted at the nasal quadrant (293.49±176.18μm) with center-involving DME (292±192.79 μm). Conclusion The presence of CRA seems to alter the morphology and influences the segment involved in DME. However, further studies with larger sample size are warranted to prove this association.

scholarly journals Anatomical and visual outcome of intravitreal bevacizumab (Avastin) in patients with diabetic macular edema

2016 ◽  
Vol 8 (1) ◽  
pp. 54-61
Author(s):  
Shyam Vyas ◽  
Raba Thapa ◽  
Sanyam Bajimaya ◽  
Eli Pradhan ◽  
Govinda Paudyal
Keyword(s):  
Diabetic Retinopathy ◽  
Macular Edema ◽  
Diabetic Macular Edema ◽  
Retinal Thickness ◽  
Intravitreal Bevacizumab ◽  
Visual Outcome ◽  
Central Retinal Thickness ◽  
Post Injection ◽  
Macular Volume

Background: Intravitreal bevacizumab has been shown to be an effective treatment of diabetic macular edema. Objective: To assess the anatomical and visual outcome of intravitrealbevacizumab (Avastin) in patients of diabetic macular edema. Materials and methods: 52 eyes of 33 patients with diabetic retinopathy with CSME were included in this study. Detailed ophthalmic examination, including best-corrected visual acuity(BCVA), stereoscopic biomicroscopy, and retinal thickness measurement by Optical coherence tomography (OCT), was done at baseline and at each follow- up visit. All patients were treated with 0.05 mL intravitreal injection containing 1.25 mg of bevacizumab and repeat injection was given in cases of recurrent/persistent subretinal or intraretinal fluid shown by OCT and deterioration of BCVA. Results: All patients completed 6 months of follow-up with mean number of 2.78 intravitreal injections per eye.The mean BCVA at baseline was 0.80 log MAR, with significant changes 0.68 (p=0.012), 0.63 (p=<0.001) and 0.60 log MAR (p=<0.001) at 6 weeks, 3 months, and 6 months respectively. Final BCVA analysis demonstrated that 25 eyes (48.07%) remained stable and 22 (42.30%) improved ≥2 lines on BCVA. The mean central retinal thickness was 449.03 μm at baseline and it decreased significantly to 410.09 (p<0.001),345.76(p<0.001), 344.55(p<0.001) and 326.51(p<0.001) at 1st day, 6 weeks, 3 months and 6 months post injection, respectively. Mean macular volume changed significantly from baseline of 10.77 μm to 10.33μm (p<0.001) 8.97 (p<0.001), 8.82 (p<0.001), 8.95 (p<0.001) at 1st day, 6 weeks, 3 months and 6 months post injection respectively. Conclusion: Intravitreal bevacizumab injection resulted in significant improvement in BCVA, central retinal thickness and total macular volume in patients with diabetic retinopathy with CSME, and this beneficial effect is maximum at 6 weeks. Also, slight reduction in these parameters at 3 month follow up suggests that visual improvement and stable macular thickness can be maintained longer with injection frequency of probably 6-12 weeks. Nepal J Ophthalmol 2016; 8(15): 54-61

scholarly journals A Transfer Learning Approach for Diabetic Retinopathy and Diabetic Macular Edema Severity Grading

2021 ◽  
Vol 35 (6) ◽  
pp. 497-502
Author(s):  
Nida Nasir ◽  
Neda Afreen ◽  
Ranjeeta Patel ◽  
Simran Kaur ◽  
Mustafa Sameer
Keyword(s):  
Diabetic Retinopathy ◽  
Macular Edema ◽  
Diabetic Macular Edema ◽  
Transfer Learning ◽  
Learning Approach ◽  
Learning Technique ◽  
Working Age ◽  
Severity Grading ◽  
Aided Diagnosis

Diabetic Retinopathy (DR) and Diabetic Macular Edema (DME) are complication that occurs in diabetic patient especially among working age group that leads to vision impairment problem and sometimes even permanent blindness. Early detection is very much needed for diagnosis and to reduce blindness or deterioration. The diagnosis phase of DR consumes more time, effort and cost when manually performed by ophthalmologists and more chances of misdiagnosis still there. Research community is working on to design computer aided diagnosis system for prior detection and for DR grading based on its severity. Ongoing researches in Artificial Intelligence (AI) have set out the advancement of deep learning technique which comes as a best technique to perform analysis and classification of medical images. In this paper, research is applied on Resnet50 model for classification of DR and DME based on its severity grading on public benchmark dataset. Transfer learning approach accomplishes the best outcome on Indian Diabetic Retinopathy Image Dataset (IDRiD).

scholarly journals A study of therapeutic effects of 670 nm irradiation in different types of diabetic macular edema

2021 ◽  
Vol 9 (4) ◽  
pp. 15-22
Author(s):  
S. Ramin ◽  
M. Ahadi ◽  
A. Ebrahimi
Keyword(s):  
Visual Acuity ◽  
Diabetic Retinopathy ◽  
Macular Edema ◽  
Diabetic Macular Edema ◽  
Retinal Thickness ◽  
Central Retinal Thickness ◽  
Diabetic Patients ◽  
Therapeutic Effects ◽  
Positive Effects ◽  
The Mean

The purpose of this study was to investigate the therapeutic effects of 670 nm irradiation in patients with diabetic macular edema. In several studies, positive effects of red/near-infrared irradiation showed in a range of ocular diseases such as macular degeneration, macular edema, and retinitis pigmentosa. This study was conducted on forty five eyes of 26 diabetic patients with macular edema between the ages of 51 and 80.Measurement of visual acuity and slit lamp examination, funduscopy, and optical coherence tomography were performed in all subjects. None of the patients had proliferative retinopathy. We used a portable LED device (Warp 10, Quantum Devices) for treatment. Patients held this device at a distance of 3 cm from their eyes for 240 seconds for three months. Full ophthalmic examinations were repeated 1, 2, and 3 months after treatment.After 3 months, the mean visual acuity improved from 0.44 ± 0.38 log MAR to 0.27 ± 0.24 log MAR and vision increased by 1.52 ± 1.16 lines post treatment (р<0.001). The mean central macula thickness decreased from 381.49 ± 144.40 μm to 359.72 ± 128.84 μm (р=0.050). In patients with mild and moderate nonproliferative diabetic retinopathy, the mean central retinal thickness decreased 52.06 ± 67.78 μm and 39.27 ± 44.69 μm, respectively, but patients with severe type showed an increase of 34.93 ± 65.65 μm in the mean central retinal thickness (р<0.001). Also, the severity of macular edema had no effect on final outcomes (р>0.05). Photobiomodulation can positively affect diabetic macular edema, especially in patients with mild to moderate diabetic retinopathy.

Clinical Diagnosis and New Classification of Diabetic Retinopathy and Diabetic Macular Edema

2018 ◽  
pp. 119-123
Keyword(s):  
Diabetic Retinopathy ◽  
Macular Edema ◽  
Diabetic Macular Edema ◽  
Vision Loss ◽  
Diabetic Patients ◽  
Common Causes ◽  
Diagnosis Classification

Diabetic retinopathy and diabetic macular edema are the most common causes of preventable blindness among the working class in many countries. The prevalence of diabetic macular edema, which is frequently associated with vision loss, is increasing. Classification of diabetic retinopathy is essential for precise and punctual treatment and follow-up, and ultimately for enhancing the quality of life of diabetic patients. Studies in recent years have shared protocols for diagnosis, classification, and follow-up.

scholarly journals Fundus fluorescein angiographic assessment of patients with proliferative Diabetic Retinopathy and Macular Edema before and after intravitreal injection of Bevacizumab

2019 ◽  
Vol 7 (11) ◽  
pp. 4111
Author(s):  
Ankur . ◽  
Yogesh Kumar ◽  
Deepesh Arora ◽  
Rupali Tyagi ◽  
Sanjeev Kumar Mittal
Keyword(s):  
Diabetic Retinopathy ◽  
Macular Edema ◽  
Diabetic Macular Edema ◽  
Proliferative Diabetic Retinopathy ◽  
Intravitreal Bevacizumab ◽  
Fundus Fluorescein Angiography ◽  
Intravitreal Bevacizumab Injection ◽  
Department Of Ophthalmology ◽  
Leakage Area ◽  
Before And After

Background: To assess the role of intravitreal bevacizumab (1.25 mg) in patients with proliferative diabetic retinopathy with macular edema in terms of change in leakage area and best-corrected visual acuity.Methods: This prospective randomized interventional study was conducted in the Department of Ophthalmology from September 2013 to August 2015 and included thirty eyes of twenty patients.After a detailed history and ocular examination, diagnosed cases of proliferative diabetic retinopathy (PDR) and diabetic macular edema (DME) underwent sequential fundus fluorescein angiography. Bevacizumab was administered intravitreally. Patients were assessed two hours after injection for anterior chamber reaction and intraocular pressure and were advised follow-ups at 24 hours and then at 1, 4, 8 and 12 weeks. For the outcome, the change of retinal new vessels by assessment of leakage area using Quantitative Planimetric Analysis (QPA) of photographs as well as the change in best-corrected visual acuity (BCVA) from baseline to the 12 weeks follow-up, were done. Results were analyzed statistically by applying t-test.Results: Intravitreal bevacizumab injection lead to a significant decrease in leakage in DME and PDR, and improvement in mean BCVA. The effect was maximum at 4 weeks which weaned off as the study progressed through it remains statistically significant at the end of 12 weeks.Conclusions: Intravitreal bevacizumab plays a major role in treating and reducing visual deterioration in patients with proliferative diabetic retinopathy and diabetic macular edema.

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