Evaluation of binocular summation ratio before and after vision training in patients with intermittent exotropia: A pilot prospective cohort study.

ABSTRACT:

Purpose

To investigate the binocular summation ratio (BSR) in intermittent exotropia (IXT) before and after vision training under varying light conditions, and to evaluate its association with the control of deviation.

Methods

Twenty IXT patients were included in the study. Patients were divided into three groups based on their control of deviation: poor, fair, and good control. Contrast sensitivity was assessed using the CSV1000-HGT chart at four spatial frequencies, evaluated both monocularly and binocularly from a distance of 2.5 meters. This evaluation occurred under both photopic and mesopic lighting conditions, with and without glare. Additionally, the BSR for each patient was calculated before and after the vision training process.

Results

The mesopic BSR under

SUBMITTER: Rostami M 

PROVIDER: S-EPMC12005873 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature