Changes of Macular Microcirculation After Near Work in Myopic Patients
10.13471/j.cnki.j.sun.yat-sen.univ（med.sci）.2023.0419
- VernacularTitle:近视患者近距离用眼后黄斑血流的变化
- Author:
Ru-ting ZHANG
1
;
Yue TENG
2
;
Jun-hui LI
2
;
Li-hua LIAN
2
Author Information
1. Ophthalmology Research Institute， Aier School of Ophthalmology， Central South University， Changsha 410000
2. The First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine， Guangzhou 510000
- Publication Type:Journal Article
- Keywords:
near work;
microcirculation in macular area;
myopia
- From:
Journal of Sun Yat-sen University(Medical Sciences)
2023;44(4):684-690
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo compare the changes of retinal microcirculation indexes in the anterior and posterior macular areas of the eyes used at close range and to explore the possible causes of myopia affected by near work. MethodsWatching mobile phone video for 1 hour at close range was used as the method of defining near work. The OCTA technology was used to measure the superficial retinal microcirculation indexes within 6 by 6 mm macular area before and after near work， including the superficial retinal VLD from the nerve fiber layer to the inner boundary of the outer plexiform layer， the VPD， nonperfusion area of FAZ， FAZ-P and FAZ circulation，. The FAZ was divided int center， inner layer， outer layer and overall according to the region， and 11 microcirculation indexes were obtained to compare the differences between before and after near work. ResultsThe indexes of superficial retinal microcirculation in the macular area generally decreased after near work， except for FAZ-A and FAZ-P（P = 0.148， 0.975）. The largest differences among both VLD and VPD occurred between the central and inner layer（Difference = 1.00， 0.80， 0.02， 0.02，P = 0.001， 0.008， 0.001， 0.008）. No differences in microcirculation indexs were observed in the macular area after near work with different diopters and axial lengths. ConclusionNear work may affect the occurrence and development of myopia by affecting the changes of retinal microcirculation in the superficial layer of macula， leading to ischemia and hypoxia.
