Understanding Visual Confusion Using Stereoscopic Displays

Not Applicable

Completed

• Conditions: Binocular Vision Suppression; Binocular; Fusion, With Defective Stereopsis; Monocular Diplopia; Diplopia
• Interventions: Behavioral: Binocular visual confusion (unilateral opaque); Behavioral: Unilateral monocular visual confusion (unilateral see-through); Behavioral: Bilateral monocular visual confusion (bilateral see-through)

• Registration Number: NCT04957745
• Lead Sponsor: Massachusetts Eye and Ear Infirmary

Brief 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.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2021-06-28
• Study First Submitted QC: 2021-07-07
• Study First Posted: 2021-07-12
• Study Start: 2021-11-09
• Primary Completion: 2022-07-27
• Study Completion: 2022-07-27
• Results First Submitted: 2023-03-13
• Status Verified: 2023-06
• Results First Submitted QC: 2023-06-16
• Last Update Submitted: 2023-06-16
• Results First Posted: 2023-07-10
• Last Update Posted: 2023-07-10

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 13

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

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Visual confusion	Bilateral monocular visual confusion (bilateral see-through)	Participants viewed peripheral targets in three different visual confusion conditions (three interventions): binocular visual confusion (unilateral opaque target), unilateral monocular visual confusion (unilateral see-through target), and bilateral monocular visual confusion (bilateral see-through target). Each intervention was presented twice in a randomized order, resulting in a total of six trials. During each trial, a peripheral target was presented in front of a forward-moving background for one minute. Participants were instructed to hold down the controller button while the target was visible and release it when a third or more of the target disappeared. After each trial, participants could take a brief break before the next trial in a different visual confusion condition was presented in a randomized order.
Visual confusion	Binocular visual confusion (unilateral opaque)	Participants viewed peripheral targets in three different visual confusion conditions (three interventions): binocular visual confusion (unilateral opaque target), unilateral monocular visual confusion (unilateral see-through target), and bilateral monocular visual confusion (bilateral see-through target). Each intervention was presented twice in a randomized order, resulting in a total of six trials. During each trial, a peripheral target was presented in front of a forward-moving background for one minute. Participants were instructed to hold down the controller button while the target was visible and release it when a third or more of the target disappeared. After each trial, participants could take a brief break before the next trial in a different visual confusion condition was presented in a randomized order.
Visual confusion	Unilateral monocular visual confusion (unilateral see-through)	Participants viewed peripheral targets in three different visual confusion conditions (three interventions): binocular visual confusion (unilateral opaque target), unilateral monocular visual confusion (unilateral see-through target), and bilateral monocular visual confusion (bilateral see-through target). Each intervention was presented twice in a randomized order, resulting in a total of six trials. During each trial, a peripheral target was presented in front of a forward-moving background for one minute. Participants were instructed to hold down the controller button while the target was visible and release it when a third or more of the target disappeared. After each trial, participants could take a brief break before the next trial in a different visual confusion condition was presented in a randomized order.

Primary Outcome Measures

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

Trial Locations

Locations (1)

Schepens Eye Research Institute; 🇺🇸 Boston, Massachusetts, United States