Understanding Visual Confusion Using Stereoscopic Displays

Diplopia Clinical Trial

Official title:

Monocular Visual Confusion for Field Expansion

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04957745
• Other study ID #: 2021P001757
• Secondary ID: R01EY031777
• Status: Completed
• Phase: N/A
• Start date: November 9, 2021
• Est. completion date: July 27, 2022

Study information

• Verified date: June 2023
• Source: Massachusetts Eye and Ear Infirmary
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

In this research study we want to test how people understand a visual scene when the same image is presented to both the eyes, but portions of these images are altered in terms of contrast, depth or in some cases motion.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 13
• Est. completion date: July 27, 2022
• Est. primary completion date: July 27, 2022
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 14 Years and older

Eligibility

Inclusion Criteria:

• Better than 20/40 visual acuity in the worse eye

• No restrictions of the peripheral visual field: (at least 60 degrees vertically and 40 degrees horizontally)

• At least 14 years of age (no upper age limit)

• Able to give voluntary, informed consent

• Able to understand English

• Binocular vision parameters within normal limits (Stereopsis = 100 arc sec on any stereo test)

Exclusion criteria:

• Patients with any physical or mental disabilities, including cognitive dysfunction, balance problems, or other deficits that could impair their ability to respond to the stimuli presented in this study will be excluded

• Being unable to complete sessions lasting 2-3 hours

Related Conditions & MeSH terms

• Confusion
• Diplopia

Intervention

Behavioral:
• Binocular visual confusion (unilateral opaque)
The peripheral target was a horizontally drifting grating measuring 10° by 10°, with a spatial frequency of 1 cycle per degree and a temporal frequency of 3 Hz, and located at 10° above the fixation. For the binocular visual confusion condition, the non-transparent (opaque) peripheral target will be displayed on only one eye (unilateral opaque display).
• Unilateral monocular visual confusion (unilateral see-through)
The peripheral target was a horizontally drifting grating measuring 10° by 10°, with a spatial frequency of 1 cycle per degree and a temporal frequency of 3 Hz, and located at 10° above the fixation. For the unilateral monocular visual confusion condition, the half-transparent peripheral target will be displayed on only one eye (unilateral see-through display).
• Bilateral monocular visual confusion (bilateral see-through)
The peripheral target was a horizontally drifting grating measuring 10° by 10°, with a spatial frequency of 1 cycle per degree and a temporal frequency of 3 Hz, and located at 10° above the fixation. For bilateral monocular visual confusion condition, the half-transparent peripheral target will be displayed on both eyes (bilateral see-through display).

Locations

Country	Name	City	State
United States	Schepens Eye Research Institute	Boston	Massachusetts

Sponsors (2)

Lead Sponsor	Collaborator
Massachusetts Eye and Ear Infirmary	National Eye Institute (NEI)

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Percentage of Total Viewing Time That Peripheral Target is Perceived	(Total time the peripheral target in the visual confusion condition was visible) / (total viewing time (=1 min))	Approximately 1-2 sessions to finish total 6 trials, up to 2 hours for each session, any time within the 4month study period