Exploring the changes of perceptual eye position after SMILE based on the virtual reality platform

OBJECTIVE: To investigate the pattern of changes in perceptual eye position in patients after Femtosecond Laser Small Incision Lenticule Extraction(SMILE), which was examined using the visual perception detection system developed by the National Engineering and Technology Research Center for Healthcare Appliances. METHODS: A total of 141 patients participated in this prospective study. The patients were divided into three groups according to the degree of myopia: low myopic group ( equivalent spherical refraction ≤ 3.00D), moderate myopic group(3.00D < equivalent spherical refraction ≤ 6.00D), and high myopic group (equivalent spherical refraction > 6.00D). The relationship of perceptual eye position was measured by the computer-controlled visual perception detection system before, 1 day, 1 week and 1 month after surgery to investigate the changes of perceptual eye position after SMILE. RESULTS: The differences in horizontal perceptual eye position were statistically significant at all time periods (X2=82.004, P