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Completed

NCT Number: NCT04957745

Understanding Visual Confusion Using Stereoscopic Displays

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.

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Key information

Conditions

Diplopia Binocular Vision Suppression Binocular; Fusion, With Defective Stereopsis Eye Diseases Monocular Diplopia Nervous System Diseases Neurologic Manifestations Pathological Conditions, Signs and Symptoms Sensation Disorders Signs and Symptoms Vision Disorders

Age range

14 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Schepens Eye Research Institute

Boston, Massachusetts, 02114, United States

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Binocular visual confusion (unilateral opaque)

Behavioral

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)

Behavioral

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)

Behavioral

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).

Primary outcomes

  1. Percentage of Total Viewing Time That Peripheral Target is Perceived

    Time frame: 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))

Sponsors and collaborators

Lead sponsor

Massachusetts Eye and Ear Infirmary

Other

Collaborators

  • National Eye Institute (NEI)

Registry information

Official study title

Monocular Visual Confusion for Field Expansion

Important dates

Study start
2021
Primary completion
2022
Study completion
2022
First posted
Jul 12, 2021
Registry last updated
Jul 10, 2023

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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