NCT03741595

Brief 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.

Trial Health

43
At Risk

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Trial has exceeded expected completion date
Enrollment
10

participants targeted

Target at below P25 for not_applicable

Timeline
Completed

Started Nov 2018

Geographic Reach
1 country

1 active site

Status
unknown

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

November 1, 2018

Completed
11 days until next milestone

First Submitted

Initial submission to the registry

November 12, 2018

Completed
3 days until next milestone

First Posted

Study publicly available on registry

November 15, 2018

Completed
12 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

November 1, 2019

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

November 1, 2019

Completed
Last Updated

November 15, 2018

Status Verified

November 1, 2018

Enrollment Period

1 year

First QC Date

November 12, 2018

Last Update Submit

November 12, 2018

Conditions

Visual Pathway Disorder

Outcome Measures

Primary Outcomes (1)

  • Detection probability

    Ability to detect a target stimulus as a function of flanker proximity

    2 hours

Study Arms (1)

Single Arm

EXPERIMENTAL
Behavioral: Item spacing

Interventions

Item spacingBEHAVIORAL

Spatial proximity of items to one another

Single Arm

Eligibility Criteria

Sexall
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

  • Normal Vision
  • English language

You may not qualify if:

  • Less than 20/20 in either eye
  • Vision-affecting abnormalities (amblyopia, keratoconus, etc.)
  • Ortho-K lenses

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

University of Houston, College of Optometry

Houston, Texas, 77204, United States

Location

Study Design

Study Type
interventional
Phase
not applicable
Allocation
NA
Masking
NONE
Purpose
BASIC SCIENCE
Intervention Model
SINGLE GROUP
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Assistant Professor

Study Record Dates

First Submitted

November 12, 2018

First Posted

November 15, 2018

Study Start

November 1, 2018

Primary Completion

November 1, 2019

Study Completion

November 1, 2019

Last Updated

November 15, 2018

Record last verified: 2018-11

Locations

US(1)