Related Experiment Video
Updated: Oct 19, 2025
Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
Published on: September 16, 2025
Relationship between age, refractive errors and motor fusion in a normal Chinese adult population: a cross-sectional
Man She1, Tao Li1, Qianqian Hu1
1Department of Ophthalmology, Jinshan Hospital of Fudan University, 201508, Shanghai, China.
Background:
To investigate the relationships between motor fusion and sex, age and spherical equivalent (SE).
Methods:
This observational study enrolled 243 healthy, nonstrabismic adults, including 94 men and 149 women aged 20 to 59 years. The subjects were divided into three groups according to SE: myopic, emmetropic and hyperopic groups. The subjects were also divided into four groups according to age: 20-29, 30-39, 40-49 and 50-59 years groups. Motor fusion was measured with a synoptophore, including subjective angle (SA), divergence, convergence and fusional vergence range (FVR).
Results:
The mean values of divergence, convergence and FVR for the whole sample group were 9.72 ± 0.26°, 19.34 ± 0.54°, and 29.06 ± 0.62°, respectively. A higher value of divergence was found in the myopic group than in the emmetropic group (p < 0.05). SE and divergence were significantly different among age groups (all p < 0.05). In addition, linear regression analysis showed that SE was correlated with divergence (p = 0.003). Age was correlated with SE, divergence and FVR (p < 0.001, p = 0.005, p = 0.002, respectively). In addition, the proportion of SA being in the comfort zone (defined as the value of SA satisfying Percival's criterion) in the age groups was significantly different (χ2 = 8.283, p = 0.041).
Conclusions:
Motor fusion is associated with age and SE in the normal Chinese adult population.
