A Novel Strabismus Screening Device Based on Virtual Reality Head-Mounted Displays with Eye Tracking System in Measuring the Angle of Deviation in Constant Concomitant Horizontal Strabismus

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

TCTR

Registry ID

TCTR20180422001

Enrollment

Registered

2018-04-22

Start date

2018-07-01

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

The angle of deviation in constant concomitant horizontal strabismus. Strabismus angle deviation virtual reality eye tracking alternate prism cover test constant concomitant horizontal strabismus repeatability

Interventions

participants will be tested with a novel VR HMDs with eye tracking system test for three times with three&#45

minute rest between each test. ,participants will be tested with a APCT for three times by a single strabismologist (WH) with three&#45

minute rest between each test.

Experimental Device,Experimental Other

virtual of reality head&#45

mounted displays (VR HMDs) with eye tracking system,alternate prism cover test (APCT)

Eligibility

Sex/Gender

All

Age

18 Years to 60 Years

Inclusion criteria

Inclusion criteria: 1.Adult aged 18-60 years in muscle clinic, KCMH 2.Constant concomitant horizontal strabismus; defined as horizontal strabismus that angle of deviation does not change in different gaze position, and the deviation can be noticed at all time. 3.Angle of deviation equals to or more than 10 prism diopters 4.Difference of near and distance angle of deviation equals to or less than 10 prism diopters 5.Best corrected visual acuity of both eyes equal to or better than 20/30.

Exclusion criteria

Exclusion criteria: 1.Range of ocular duction less than 80 prism diopters 2.Angle kappa 3.Eccentric fixation 4.Anterior segment eye abnormalities 5.Restrictive or paralytic strabismus 6.Nystagmus 7.Neurological underlying disease 8.Unable to cooperate / noncommunicative patients

Design outcomes

Primary

Measure	Time frame
To determine the agreement of a novel adapted virtual reality head-mounted displays (VR HMDs) with e after end of the intervention immediately Intra-class correlation (ICC) and Bland-Altman plot	—

Secondary

Measure	Time frame
To determine repeatability of a novel adapted virtual reality head-mounted displays (VR HMDs) with e after end of the intervention immediately Intra-class correlation (ICC)	—

Contacts

Public ContactJirapha Songphetmongkol

Faculty of Medicine, Chulalongkorn university

evejirapha@gmail.com0869807920

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026

A Novel Strabismus Screening Device Based on Virtual Reality Head&#45;Mounted Displays with Eye Tracking System in Measuring the Angle of Deviation in Constant Concomitant Horizontal Strabismus