Effects of various hyperopia intervention levels on male college students’ gait kinematics

Abstract

Background: Hyperopia is a common blurred vision phenomenon that affects postural control in gait; however, current research has focused on the alteration and correction of hyperopia’s physiological characteristics, ignoring the effect of hyperopia on gait kinematic characteristics. The effect of hyperopia on the basic form of movement walking is a worthy concern.Objective: To investigate the gait kinematic characteristics of male college students with varying degrees of visual acuity (normal vision, hyperopia 150°, and hyperopia 450°), as well as to provide a theoretical foundation for the effect of visual acuity on gait and fall risk reduction.Methods: Twenty-two male college students with normal visual acuity were chosen. Their vision was tested using a standard visual acuity logarithm table at normal and with 150° and 450° concave lenses. Gait kinematic data were collected under normal vision and hyperopic conditions using the PN3 Pro advanced inertial motion capture system and Axis Studio application program.Results and conclusion: 1. The change of center of gravity in Pre-double support was smaller than normal vision; Late-single support and Late-swing was larger than normal vision; 2. The percentage of the double-leg support decreased; the percentage of the single-leg support and the Late-swing increased; 3. For the joints’ range of motion, Trunk flexion and extension range of motion in Pre-single support, Late-double support and Pre-swing smaller than normal visual acuity, and Late-swing larger than normal; hip internal abduction and adduction and internal and external rotation are larger than normal vision in Late-single support; knee and ankle in abduction and adduction direction are larger than normal vision in the swing stage; hip flexion and extension, internal external rotation are larger than normal vision in the swing stage. Hyperopic interventions have an impact on the kinematic characteristics of gait in male college students, mainly in terms of altered balance, increased instability, increased difficulty in maintaining trunk stability, and increased risk of injury.

Kinematic characteristics of gait with different myopia: a cross-sectional study

“…The wear locations for the sensors included the midpoint of the forehead, the upper outer third of both scapulae, the forearm, the outer midpoint of the thigh, the fourth lumbar vertebra, the outer midpoint of the thigh and calf, the back of the foot, and the back of the hand (as shown in Figure 2 ). A total of 16 sensors were worn, with calibration available upon request after donning ( 16 ).…”

“…The Shapiro-Wilk test was used to examine the normality of the data. Measures were expressed as mean ± standard deviation, and data were compared among the three groups using one-way repeated measures ANOVA with post-hoc comparisons using the LSD analysis ( 16 ). A repeated measures one-way ANOVA, which determines whether all the samples are the same.…”