# Anisometropic Patient and Current Bioelectrical Activity in the Masticatory and Cervical Muscles

## TL;DR

This study examines how anisometropia affects the bioelectrical activity of masticatory and cervical muscles in a 23-year-old female patient.

## Contribution

The study presents a case showing muscle asymmetry linked to anisometropia, suggesting a potential connection requiring further research.

## Key findings

- Higher tension in resting mandibular position and pain-free opening was observed on the right (myopia) side.
- Higher tension during clenching was observed on the left (hyperopia and astigmatism) side.

## Abstract

(1) Background: This study aims to analyze the bioelectrical activity of the masticatory and cervical muscles in a subject with anisometropia. (2) Methods: A female patient aged 23 years with a best-corrected visual acuity of 1.0 in the right eye and 0.1 in the left eye, a refractive error of −2.25 Dsph in the right eye and +4.25 Dsph in the left eye, and astigmatism of −1.75 Dcyl axis 24° was examined. A comprehensive ophthalmological examination and the study of the bioelectrical activity of the muscles were carried out. During the ophthalmological examination, best-corrected visual acuity was determined, refractive error (spherical equivalent) was assessed, and additionally, retinal thickness, choroidal thickness, axial length, and intraocular pressure were measured. (3) Results: It was demonstrated that higher tension in the resting mandibular position and pain-free maximum unassisted opening were observed on the right side (myopia). Conversely, higher tension during maximum voluntary clenching in the intercuspal position and maximum voluntary clenching on dental cotton rolls in the intercuspal position was observed on the left side (hyperopia and astigmatism). (4) Conclusions: In the case study, muscle asymmetry was demonstrated, which is likely associated with anisometropia. This phenomenon requires further investigation.