Retinal Hemorheologic Characterization of Early-Stage Diabetic Retinopathy Using Adaptive Optics Scanning Laser Ophthalmoscopy

2014 ◽  
Vol 55 (12) ◽  
pp. 8513-8522 ◽  
Author(s):  
S. Arichika ◽  
A. Uji ◽  
T. Murakami ◽  
N. Unoki ◽  
S. Yoshitake ◽  
...  
Keyword(s):  
Diabetic Retinopathy ◽  
Adaptive Optics ◽  
Early Stage ◽  
Scanning Laser ◽  
Scanning Laser Ophthalmoscopy

scholarly journals Retinal Blood Velocity and Flow in Early Diabetes and Diabetic Retinopathy Using Adaptive Optics Scanning Laser Ophthalmoscopy

2019 ◽  
Vol 8 (8) ◽  
pp. 1165 ◽  
Author(s):  
Cherilyn Mae A. Palochak ◽  
Hee Eun Lee ◽  
Jessica Song ◽  
Andrew Geng ◽  
Robert A. Linsenmeier ◽  
...  
Keyword(s):  
Blood Flow ◽  
Diabetic Retinopathy ◽  
Adaptive Optics ◽  
Blood Velocity ◽  
Vessel Density ◽  
Retinal Blood Flow ◽  
Low Flow ◽  
Scanning Laser ◽  
Diabetic Patients ◽  
Scanning Laser Ophthalmoscopy

Using adaptive optics scanning laser ophthalmoscopy (AOSLO), we measured retinal blood velocity and flow in healthy control eyes and eyes of diabetic patients with or without retinopathy. This cross-sectional study included 39 eyes of 30 patients with diabetes (DM) with mild non-proliferative diabetic retinopathy (NPDR) or without retinopathy (DM no DR) and 21 eyes of 17 healthy age-matched controls. Participants were imaged with a commercial optical coherence tomography angiography (OCTA) device (RTVue-XR Avanti) and AOSLO device (Apaeros Retinal Imaging System, Boston Micromachines). We analyzed AOSLO-based retinal blood velocity and flow, and OCTA-based vessel density of the superficial (SCP), deep retinal capillary plexus (DCP), and full retina. Retinal blood velocity was significantly higher in eyes with DM no DR and lower in NPDR across all vessel diameters compared to controls. Retinal blood flow was significantly higher in DM no DR and lower in NPDR in vessel diameters up to 60 μm compared to controls. When comparing flow outliers (low-flow DM no DR eyes and high-flow NPDR eyes), we found they had a significantly different retinal vessel density compared to the remaining eyes in the respective groups. Retinal blood velocity and flow is increased in eyes with DM no DR, while these parameters are decreased in eyes with mild NPDR compared to healthy age-matched controls. The similarity of OCTA vessel density among outliers in the two diabetic groups suggests an initial increase followed by progressive decline in blood flow and OCTA vessel density with progression to clinical retinopathy, which warrants further investigation.

scholarly journals Characterization of In Vivo Retinal Lesions of Diabetic Retinopathy Using Adaptive Optics Scanning Laser Ophthalmoscopy

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Sonja G. Karst ◽  
Jan Lammer ◽  
Salma H. Radwan ◽  
Hanna Kwak ◽  
Paolo S. Silva ◽  
...  
Keyword(s):  
Diabetic Retinopathy ◽  
Adaptive Optics ◽  
Scattered Light ◽  
Disease Onset ◽  
Morphological Characteristics ◽  
Response To Therapy ◽  
Vascular Lesions ◽  
Scanning Laser ◽  
Scanning Laser Ophthalmoscopy

Purpose. To characterize hallmark diabetic retinopathy (DR) lesions utilizing adaptive optics scanning laser ophthalmoscopy (AOSLO) and to compare AOSLO findings with those on standard imaging techniques. Methods. Cross-sectional study including 35 eyes of 34 study participants. AOSLO confocal and multiply scattered light (MSL) imaging were performed in eyes with DR. Color fundus photographs (CF), infrared images of the macula (Spectralis, Heidelberg), and Spectralis spectral domain optical coherence tomography SDOCT B-scans of each lesion were obtained and registered to corresponding AOSLO images. Main Outcome Measures. Individual lesion characterization by AOSLO imaging. AOSLO appearance was compared with CF and SDOCT imaging. Results. Characterized lesions encompassed 52 microaneurysms (MA), 20 intraretinal microvascular abnormalities (IRMA), 7 neovascularization (NV), 11 hard exudates (HE), 5 dot/blot hemorrhages (HEM), 4 cotton wool spots (CWS), and 14 intraretinal cysts. AOSLO allowed assessment of perfusion in vascular lesions and enabled the identification of vascular lesions that could not be visualized on CF or SDOCT. Conclusions. AOSLO imaging provides detailed, noninvasive in vivo visualization of DR lesions enhancing the assessment of morphological characteristics. These unique AOSLO attributes may enable new insights into the pathological changes of DR in response to disease onset, development, regression, and response to therapy.

scholarly journals Characterization of Inner Retinal Hyperreflective Alterations in Early Cognitive Impairment on Adaptive Optics Scanning Laser Ophthalmoscopy

2019 ◽  
Vol 60 (10) ◽  
pp. 3527 ◽  
Author(s):  
Yi Stephanie Zhang ◽  
Alex C. Onishi ◽  
Nina Zhou ◽  
Jessica Song ◽  
Sahej Samra ◽  
...  
Keyword(s):  
Cognitive Impairment ◽  
Adaptive Optics ◽  
Scanning Laser ◽  
Scanning Laser Ophthalmoscopy

scholarly journals Comparing diabetic retinopathy lesions in scanning laser ophthalmoscopy and colour fundus photography

2019 ◽  
Vol 97 (8) ◽  
Author(s):  
Allan Zhifa Nghiem ◽  
Paul Nderitu ◽  
Marko Lukic ◽  
Mumina Khatun ◽  
Ross Largan ◽  
...  
Keyword(s):  
Diabetic Retinopathy ◽  
Fundus Photography ◽  
Scanning Laser ◽  
Scanning Laser Ophthalmoscopy

Non-mydriatic ultrawide field scanning laser ophthalmoscopy compared with dilated fundal examination for assessment of diabetic retinopathy and diabetic macular oedema in Chinese individuals with diabetes mellitus

2018 ◽  
Vol 103 (9) ◽  
pp. 1327-1331 ◽  
Author(s):  
Simon K H Szeto ◽  
Raymond Wong ◽  
Jerry Lok ◽  
Fangyao Tang ◽  
Zihan Sun ◽  
...  
Keyword(s):  
Diabetic Retinopathy ◽  
Clinical Examination ◽  
Macular Oedema ◽  
Chinese Population ◽  
Retrospective Cohort ◽  
Diabetic Macular Oedema ◽  
Scanning Laser ◽  
Scanning Laser Ophthalmoscopy ◽  
Chinese Cohort ◽  
Clinical Grading

AimsTo evaluate the performance of ultrawide field scanning laser ophthalmoscopy (UWF-SLO) for assessing diabetic retinopathy (DR) and diabetic macular oedema (DME) in a Chinese population, compared with clinical examination.MethodsThis is a retrospective cohort study. A series of 322 eyes from 164 patients with DM were included. Each patient underwent both dilated fundal examination with DR and DME grading by retina specialist and non-mydriatic 200° UWF-SLO (Daytona, Optos, Dunfermline, UK). The severity of DR and DME from UWF-SLO images was further graded by ophthalmologists, according to both international clinical DR and DME disease severity scales and the standard 7-field Early Treatment Diabetic Retinopathy Study (ETDRS) scale. Any DR, DME and vision-threatening DR (VTDR) were treated as endpoints for this study.Results23 out of 322 images (7.14%), including all four cases with proliferative DR on clinical examinations, were determined as ungradable. When the international scale was used for grading UWF-SLO images, the sensitivity of any DR, DME and VTDR was 67.7%, 67.4% and 72.6%, respectively; the specificity of any DR, DME and VTDR was 97.8%, 97.3% and 97.8%, respectively. The agreement with clinical grading in picking up any DR, DME and VTDR was substantial, with κ-values of 0.634, 0.694 and 0.707, respectively. The performance of UWF-SLO was shown to be lower when ETDRS scale was used for grading the images.ConclusionThe performance of non-mydriatic UWF-SLO is comparable in identifying DR with that of clinical examination in a Chinese cohort. However, whether UWF-SLO can be considered as tool for screening DR is still undetermined.

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