Peripheral Reading

NCT ID: NCT03640130

Last Updated: 2018-11-14

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

UNKNOWN

Clinical Phase

NA

Total Enrollment

6 participants

Study Classification

INTERVENTIONAL

Study Start Date

2018-11-01

Study Completion Date

2019-03-01

Brief Summary

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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

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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.

Conditions

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Central Visual Impairment

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

OTHER

Blinding Strategy

NONE

Study Groups

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Single Arm

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

Group Type EXPERIMENTAL

Gaze-contingent text enhancement

Intervention Type BEHAVIORAL

In different testing blocks, the efficacy of the different enhancements will be evaluated, such as inverting the text in a gaze-contingent inverted "spotlight."

Interventions

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Gaze-contingent text enhancement

In different testing blocks, the efficacy of the different enhancements will be evaluated, such as inverting the text in a gaze-contingent inverted "spotlight."

Intervention Type BEHAVIORAL

Eligibility Criteria

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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
Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University of Houston

OTHER

Sponsor Role lead

Responsible Party

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Daniel R. Coates

Assistant Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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University of Houston, College of Optometry

Houston, Texas, United States

Site Status

Countries

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United States

Other Identifiers

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STUDY00001096

Identifier Type: -

Identifier Source: org_study_id

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