Hui Li1,2, Xiaobing Yu3,4, Bodi Zheng2,5, Shan Ding1,2, Zhongqing Mu1,2, Lixin Guo6,7. 1. Department of Endocrinology, Beijing Hospital, Nations Center of Gerontology, Beijing, China. 2. Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, P.R.China, Beijing, China. 3. Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, P.R.China, Beijing, China. yuxiaobing@sina.com. 4. Department of Ophthalmology, Beijing Hospital, Nations Center of Gerontology, Beijing, China. yuxiaobing@sina.com. 5. Department of Ophthalmology, Beijing Hospital, Nations Center of Gerontology, Beijing, China. 6. Department of Endocrinology, Beijing Hospital, Nations Center of Gerontology, Beijing, China. glx1218@163.com. 7. Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, P.R.China, Beijing, China. glx1218@163.com.
Abstract
BACKGROUND: To investigate the changes in retinal nerve fiber layer thickness and macular blood flow density during the preclinical stage of diabetic retinopathy and their relationship with blood glucose. METHODS: In this cross-sectional study, 97 diabetic patients (total of 188 eyes; 144 eyes in no diabetic retinopathy group, 44 eyes in mild diabetic non-proliferative retinopathy group) and 35 healthy people (70 eyes) were enrolled, All the subjects were divided into different groups based on their HbA1c levels, and they underwent optical coherence tomography angiography. We compared the optical coherence tomography angiography parameters and retinal nerve fiber layer thickness among the different glucose groups. RESULTS: The parafoveal vessel density and the temporal retinal nerve fiber layer thickness were lower (p < 0.05) in the diabetic group than in the normal group. The diabetic group showed a higher acircularity index than the normal group. The normal group had the highest vessel density and the lowest acircularity index, followed by the no-diabetic retinopathy group and the mild non-proliferative retinopathy group, (p < 0.001). Foveal vascular density and parafoveal vessel density decreased with an increase in HbA1c. There was a negative correlation between parafoveal vessel density in the deep retinal vascular layer and fasting blood glucose (p < 0.01). The temporal retinal nerve fiber layer thickness decreased across the HbA1c level groups, and was positively correlated with the parafoveal vessel density in the superficial retinal vascular layer (p < 0.05). CONCLUSIONS: This study shows that retinal microvasculopathy and neuropathy can be present in the absence of retinopathy. The vessel density of the deep retinal vascular layer was negatively correlated with fasting blood glucose, and the temporal retinal nerve fiber layer thickness was positively correlated with the vessel density of the superficial retinal vascular layer. These indicators are helpful for endocrinologists and ophthalmologists in detecting early diabetic retinal pathological lesions.
BACKGROUND: To investigate the changes in retinal nerve fiber layer thickness and macular blood flow density during the preclinical stage of diabetic retinopathy and their relationship with blood glucose. METHODS: In this cross-sectional study, 97 diabeticpatients (total of 188 eyes; 144 eyes in no diabetic retinopathy group, 44 eyes in mild diabetic non-proliferative retinopathy group) and 35 healthy people (70 eyes) were enrolled, All the subjects were divided into different groups based on their HbA1c levels, and they underwent optical coherence tomography angiography. We compared the optical coherence tomography angiography parameters and retinal nerve fiber layer thickness among the different glucose groups. RESULTS: The parafoveal vessel density and the temporal retinal nerve fiber layer thickness were lower (p < 0.05) in the diabetic group than in the normal group. The diabetic group showed a higher acircularity index than the normal group. The normal group had the highest vessel density and the lowest acircularity index, followed by the no-diabetic retinopathy group and the mild non-proliferative retinopathy group, (p < 0.001). Foveal vascular density and parafoveal vessel density decreased with an increase in HbA1c. There was a negative correlation between parafoveal vessel density in the deep retinal vascular layer and fasting blood glucose (p < 0.01). The temporal retinal nerve fiber layer thickness decreased across the HbA1c level groups, and was positively correlated with the parafoveal vessel density in the superficial retinal vascular layer (p < 0.05). CONCLUSIONS: This study shows that retinal microvasculopathy and neuropathy can be present in the absence of retinopathy. The vessel density of the deep retinal vascular layer was negatively correlated with fasting blood glucose, and the temporal retinal nerve fiber layer thickness was positively correlated with the vessel density of the superficial retinal vascular layer. These indicators are helpful for endocrinologists and ophthalmologists in detecting early diabetic retinal pathological lesions.
Entities:
Keywords:
Acircularity index; Retinal nerve fiber layer thickness; Retinopathy; Type 2 diabetes; Vessel density
Authors: Rodolfo Mastropasqua; Lisa Toto; Alessandra Mastropasqua; Raffaella Aloia; Chiara De Nicola; Peter A Mattei; Guido Di Marzio; Marta Di Nicola; Luca Di Antonio Journal: Int J Ophthalmol Date: 2017-10-18 Impact factor: 1.779