Understanding Visual Confusion Using Stereoscopic Displays

Sponsor

Massachusetts Eye and Ear Infirmary (Other)

Overall Status

Recruiting

CT.gov ID

NCT04957745

Collaborator

National Eye Institute (NEI) (NIH)

Enrollment

Location

Arm

31.7

Anticipated Duration (Months)

0.9

Patients Per Site Per Month

Study Details

Study Description

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.

Condition or Disease	Intervention/Treatment	Phase
Diplopia Binocular Vision Suppression Binocular; Fusion, With Defective Stereopsis Monocular Diplopia	Other: Visual confusion	N/A

Study Design

Study Type:

Interventional

Anticipated Enrollment :

30 participants

Allocation:

N/A

Intervention Model:

Single Group Assignment

Masking:

None (Open Label)

Primary Purpose:

Basic Science

Official Title:

Monocular Visual Confusion for Field Expansion

Actual Study Start Date :

Nov 9, 2021

Anticipated Primary Completion Date :

Jul 1, 2024

Anticipated Study Completion Date :

Jul 1, 2024

Arms and Interventions

Arm	Intervention/Treatment
Other: Visual confusion The study participants will respond to various visual confusion stimuli presented on a stereoscopic display designed to simulate binocular/monocular visual confusions	Other: Visual confusion We will show peripheral target images on a background motion in a stereoscopic display. For the binocular visual confusion condition, the target peripheral image will be displayed on only one eye. For unilateral and bilateral monocular visual confusion conditions, the half-transparent peripheral image will be displayed on only one eye and both eyes, respectively.

Arm

Intervention/Treatment

Other: Visual confusion

The study participants will respond to various visual confusion stimuli presented on a stereoscopic display designed to simulate binocular/monocular visual confusions

Other: Visual confusion

We will show peripheral target images on a background motion in a stereoscopic display. For the binocular visual confusion condition, the target peripheral image will be displayed on only one eye. For unilateral and bilateral monocular visual confusion conditions, the half-transparent peripheral image will be displayed on only one eye and both eyes, respectively.

Outcome Measures

Primary Outcome Measures

Perceptual Dominance rate [Through study completion, an average of 4 months]
The time perceived target image under visual confusion condition divided by the total viewing time (seconds).

Eligibility Criteria

Criteria

Ages Eligible for Study:

14 Years and Older

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Yes

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