Xin yixue (Jun 2023)

Clinical features and treatment of functional vision loss

  • Zhao Xiaonan, Cheng Xianning, Wang Hong

DOI
https://doi.org/10.3969/j.issn.0253-9802.2023.06.014
Journal volume & issue
Vol. 54, no. 6
pp. 447 – 451

Abstract

Read online

Objective To investigate the clinical features of functional vision loss and evaluate the efficacy of different types of visual function training. Methods Clinical data of children with functional vision loss admitted to Outpatient Department were retrospectively analyzed. All children were divided into the observation and control groups according to whether they received visual function training. In the observation group，patients received binocular function training （including accommodative and convergence training） and those in the control group received refractive correction alone. Visual acuity and binocular function were assessed during follow-up. Results Four weeks later，the best corrected visual acuity （BCVA） of all 36 eyes （100%） was improved to 1.0 in the observation group，while 16 eyes （51.6% ） in the control group，and the difference was statistically significant （P < 0.001）. After visual function training，all parameters of accommodation were significantly improved compared with those before corresponding training in both observation and control groups，and the efficacy in the observation group were better than that in control group （all P < 0.05）. In the observation group，patients with abnormal accommodation alone achieved better improvement in BCVA compared with their counterparts complicated with convergence insufficiency or convergence excess. One month after the cessation of training，the BCVA of 4 eyes of patients with abnormal accommodation complicated with convergence excess was declined，and that of the remaining 32 eyes was maintained at 1.0. Conclusions Functional vision loss is mainly caused by abnormal accommodation alone. Visual function training can effectively improve the visual acuity，especially for patients with abnormal accommodation alone. Patients with abnormal accommodation complicated with convergence excess require longer training time. Relevant symptoms are prone to recurrence after the cessation of training.

Keywords