Abstract

Introduction: visual stress sometimes involves the presence of musculoskeletal disorders in the cervicodorsal area. The aim of this study is to establish relationships between the presence of non-strabismic binocular dysfunctions and neck pain. Material and method: 60 participants were included. A complete examination of the binocular vision was performed. The subjects were classified into two groups: binocular anomalies and normal binocular vision. Neck complaints were measured with the neck disability index, the visual analogue scale, cervical range of motion, deep flexor muscle activation score (AS) and performance index (PI). Results: the AS showed the greatest differences, by grouping the participants according to their normative levels, in the value of the variables that describe the state of the binocular vision. On the other hand, when we classify the patients according to the PI value we find a significant difference (p = 0.036, effect size = 0.27) in the Lateral Foria in Far, being the value in the 20 subjects with PI greater than or equal to 10 (median = 0 Δ, Q1 = 0 Δ, Q3 = 0 Δ) and in the 40 participants with PI less than 10 (median = 0 Δ, Q1 = -1 Δ, Q3 = 0 Δ ). Conclusion: the subjects with binocular vision impairment showed a diminished response to the deep cervical musculature, with low AS and PI levels, as well as presenting a tendency to suffer cervicalgia of more than three months evolution and a lower range of motion.