Visual Stimulus Competition

Visual Pathway Disorder Clinical Trial

Official title:

Visual Stimulus Competition

Clinical Trial Details — Status: Enrolling by invitation

Administrative data

• NCT number: NCT03741595
• Other study ID #: STUDY00001197
• Status: Enrolling by invitation
• Phase: N/A
• Start date: November 1, 2018
• Est. completion date: November 1, 2019

Study information

• Verified date: November 2018
• Source: University of Houston
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

In this study, we will use behavioral methods to investigate several types of interactions that occur when visual stimuli conflict, such as when objects are presented nearby to each other, or to separate eyes. We will target purely sensory aspects by using simple geometric shapes: letters and lines. Our outcome measure will be performance thresholds.

Description:

Participants will be shown visual stimuli on displays and be asked to identify some aspect of the stimuli: their orientation and/or color, the existence of binocular suppression, etc.

In different blocks, stimuli will be manipulated in different ways to characterize basic aspects of visual processing. For example, the contrast, color, and/or spatial layout of stimuli will be varied.

Recruitment information / eligibility

• Status: Enrolling by invitation
• Enrollment: 10
• Est. completion date: November 1, 2019
• Est. primary completion date: November 1, 2019
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: N/A and older

Eligibility

Inclusion Criteria:

• Normal Vision

• English language

Exclusion Criteria:

• Less than 20/20 in either eye

• Vision-affecting abnormalities (amblyopia, keratoconus, etc.)

• Ortho-K lenses

Related Conditions & MeSH terms

• Visual Pathway Disorder

Intervention

Behavioral:
• Item spacing
Spatial proximity of items to one another

Locations

Country	Name	City	State
United States	University of Houston, College of Optometry	Houston	Texas

Sponsors (1)

Lead Sponsor	Collaborator
University of Houston

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Detection probability	Ability to detect a target stimulus as a function of flanker proximity	2 hours