Observation and study on uncorrected distance visual acuity and ocular adjustment function before and after excimer laser photorefractive keratectomy
10.3980/j.issn.1672-5123.2022.9.23
- VernacularTitle:准分子激光表层切削手术前后裸眼远视力及眼调节功能的变化
- Author:
Li-Wei QIN
1
;
Feng-Xiang WANG
1
;
Li-Qun CAO
1
;
Chun-Yu TIAN
1
;
Jie YU
1
;
Wei-Hua CAO
1
;
Qi-Tong WEN
1
Author Information
1. Department of Ophthalmology, PLA General Hospital, Beijing 100039, China; Department of Ophthalmology, the Sixth Medical Center of the General Hospital of the PLA, Beijing 100048, China
- Publication Type:Journal Article
- Keywords:
excimer laser photorefractive keratectomy;
uncorrected distance visual acuity;
ocular accommodative parameters;
visual fatigue
- From:
International Eye Science
2022;22(9):1539-1542
- CountryChina
- Language:Chinese
-
Abstract:
AIM: To analyze the changes of uncorrected distance visual acuity(UCDVA)and ocular accommodation before and after excimer laser photorefractive keratectomy(PRK).METHODS: A retrospective study. There were 120 patients(240 eyes)who underwent PRK surgery in our center from December 2017 to December 2019 divided into two groups according to the diopter of spherical equivalent(SE): 70 cases with SE≤-6.00D in the mild to moderate myopia group and 50 cases with -6.00D0.05)and postoperative at 3mo was superior to preoperative operation(P<0.05); High myopia group did not change significantly at 1wk and 1mo after operation compared with preoperative operation(P>0.05), and increased at 3mo after operation compared with preoperative level(P<0.01). For low to moderate myopia group, there was no significant difference in preoperative and postoperative NRA, and at 1wk after operation, NRA of high myopia group temporarily increased compared with preoperative operation(P<0.01). At 1mo after operation, it returned to the preoperative level(P>0.05), and significantly increased at 3mo after operation compared with preoperative operation(P<0.01). Monocular AF for both groups significantly decreased at 1wk after operation compared with preoperative operation, recovered at 1mo after operation and was significantly better at 3mo after operation(all P<0.01); The low-to-moderate group increased more than the high-myopia group.CONCLUSION: PRK has a good correction effect for myopia below -9.00D, and people in low to moderate myopia have a better postoperative UCDVA correction effect than those in high myopia. The eye accommodation will be abnormal in a short period after operation. The recovery and improvement time of accommodative function in low-moderate myopia group are shorter than that in high myopia group, but both groups can recover and improve at 3mo after operation compared with the preoperative levels.
