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Study identifier: NCT07642687 Synced from ClinicalTrials.gov · July 29, 2026
● Recruiting

Near Vergence Training for Distance Control in Intermittent Exotropia

Condition: Intermittent Exotropia  ·  Sponsor: The Hong Kong Polytechnic University

PhaseNA
Planned participants42
Who can joinAll sexes, 6 Years to 25 Years
Healthy volunteersNo

About this study

Intermittent Exotropia (IXT) is a common type of eye misalignment where one eye periodically turns outward, and control is typically much worse when looking at objects far away than close up. However, most currently available training programme are focused on near-viewing tasks. The goal of this clinical trial is to investigate if a new, structured, home-based near eye training program works to improve distance eye alignment control in children and young adults with IXT. The main questions the study aims to answer are: * Does a 12-week near eye training program improve a participant's ability to control their eye alignment when looking at a distance? * Does using a special reading glasses during near training help to control distance eye alignment better than doing the training without the reading glasses? * Do the benefits of this eye training last after the training has stopped? This is a two- phase, single- masked (examiner masked), randomized clinical trial with crossover design. The entire study duration is about 24 weeks. A total sample size of 42 participants, aged 6 to 25 years with diagnosed Basic (distance deviation is within 10 prism diopters of the near deviation) or Divergence excess (distance deviation is at least 10 prism diopters greater than the near deviation) IXT, will be recruited. In Phase I (Weeks 0 to 12), participants will be randomly allocated into one of three groups, with 14 individuals in each group: * Group 1 does eye training while wearing s…

This description comes directly from the study's public registry record.

Talk to the study team

Horace Ho-yin Wong, MClinOptom, BSc (Hons) Optom  ·  852-63384048  ·  horace.wong@polyu.edu.hk

Tsz Wing Leung, PhD  ·  852- 27664268  ·  jeffrey.TW.leung@polyu.edu.hk

Always discuss trial participation with your own doctor first.

Locations (1)

The Optometry Clinic, The Hong Kong Polytechnic UniversityHong Kong, Hong KongRecruiting

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Source record: clinicaltrials.gov/study/NCT07642687