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Peripheral Reading

Primary Purpose

Central Visual Impairment

Status
Unknown status
Phase
Not Applicable
Locations
United States
Study Type
Interventional
Intervention
Gaze-contingent text enhancement
Sponsored by
University of Houston
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional other trial for Central Visual Impairment

Eligibility Criteria

undefined - undefined (Child, Adult, Older Adult)All SexesAccepts Healthy Volunteers

Inclusion Criteria:

  • Normal vision
  • English language

Exclusion Criteria:

  • Less than 20/20 vision in either eye
  • Abnormalities which affect vision (amblyopia, keratoconus, etc.)
  • Ortho-K lenses

Sites / Locations

  • University of Houston, College of Optometry

Arms of the Study

Arm 1

Arm Type

Experimental

Arm Label

Single Arm

Arm Description

Each participant will participate in several blocks (randomized order), to evaluate performance with and without behavioral gaze-contingent text enhancements.

Outcomes

Primary Outcome Measures

Reading speed
Average time/word it takes to read a paragraph of text.
Reading accuracy
Ability to correctly answer comprehension questions or orally read words
Efficiency of eye movement
Ability to move the eyes systematically from word to word

Secondary Outcome Measures

Full Information

First Posted
August 19, 2018
Last Updated
November 13, 2018
Sponsor
University of Houston
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1. Study Identification

Unique Protocol Identification Number
NCT03640130
Brief Title
Peripheral Reading
Official Title
Factors Limiting Peripheral Reading
Study Type
Interventional

2. Study Status

Record Verification Date
November 2018
Overall Recruitment Status
Unknown status
Study Start Date
November 1, 2018 (Actual)
Primary Completion Date
March 1, 2019 (Anticipated)
Study Completion Date
March 1, 2019 (Anticipated)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Principal Investigator
Name of the Sponsor
University of Houston

4. Oversight

Studies a U.S. FDA-regulated Drug Product
No
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
No

5. Study Description

Brief Summary
The purpose of this study is to evaluate reading performance in the visual periphery by simulating central vision loss using a computer-controlled gaze-contingent display with an eye tracker. Participants will read a page of text at a comfortable rate. Several manipulations hypothesized to improve reading will be tested, such as an inverted-text "spotlight" of a single word that follows the participant's gaze.
Detailed Description
Participants will view paragraphs of multiple sentences of text with their central vision blocked computationally with a "simulated scotoma." Participants will be free to move their eyes around the page of text at a comfortable rate. The three outcomes described elsewhere will be evaluated. In different blocks, text will contain one or more of several dynamic assistive manipulations that are hypothesized to enhance reading: 1) inverting the text at a given position, with instructions for the participant to attend to that location, which simulates a "surrogate fovea" of a patient with central vision loss. 2) horizontally expanding text to alleviate within-word crowding. 3) highlighting the next word with a visible indicator to encourage proper eye movements.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Central Visual Impairment

7. Study Design

Primary Purpose
Other
Study Phase
Not Applicable
Interventional Study Model
Single Group Assignment
Masking
None (Open Label)
Allocation
N/A
Enrollment
6 (Anticipated)

8. Arms, Groups, and Interventions

Arm Title
Single Arm
Arm Type
Experimental
Arm Description
Each participant will participate in several blocks (randomized order), to evaluate performance with and without behavioral gaze-contingent text enhancements.
Intervention Type
Behavioral
Intervention Name(s)
Gaze-contingent text enhancement
Intervention Description
In different testing blocks, the efficacy of the different enhancements will be evaluated, such as inverting the text in a gaze-contingent inverted "spotlight."
Primary Outcome Measure Information:
Title
Reading speed
Description
Average time/word it takes to read a paragraph of text.
Time Frame
From enrollment to completion of testing (<2 weeks)
Title
Reading accuracy
Description
Ability to correctly answer comprehension questions or orally read words
Time Frame
From enrollment to completion of testing (<2 weeks)
Title
Efficiency of eye movement
Description
Ability to move the eyes systematically from word to word
Time Frame
From enrollment to completion of testing (<2 weeks)

10. Eligibility

Sex
All
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Eligibility Criteria
Inclusion Criteria: Normal vision English language Exclusion Criteria: Less than 20/20 vision in either eye Abnormalities which affect vision (amblyopia, keratoconus, etc.) Ortho-K lenses
Facility Information:
Facility Name
University of Houston, College of Optometry
City
Houston
State/Province
Texas
ZIP/Postal Code
77204
Country
United States

12. IPD Sharing Statement

Plan to Share IPD
Undecided
IPD Sharing Plan Description
To conform with open science directives, will likely post the de-identified behavioral data on a public server.

Learn more about this trial

Peripheral Reading

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