Recruiting

Observational Study

Sponsor:

State University of New York College of Optometry

Code:

NCT05684224

Conditions

Accommodation

Eligibility Criteria

Sex: All

Age: 18 - 30

Healthy Volunteers: Not accepted

Interventions

Dynamic accommodation

Study Details

Brief summary:

HYPOTHESIS:

1. Horizontal convergence tracked with Tobii glasses is a reliable substitute for accommodation in young myopes and hyperopes with normal accommodative amplitudes
2. Young mypopes and hyperopes demonstrate different reading behaviors during near work

AIMS \& OBJECTIVES:

1. Compare the accommodative responses measured with the Grand Seiko open-field autorefractor to those derived from the Tobii Glasses, when subjects wear (1) spectacle glasses, (2) single vision contact lenses (SVCLs), and (3) multifocal contact lenses (MFCLs).
2. Investigate subjects' natural and dynamic accommodative behaviors and eye postures during reading using the Tobii Glasses.
3. Compare the change in natural and dynamic accommodative behaviors and eye postures during reading between myopes and hyperopes using the Tobii Glasses.

Conditions

Accommodation

Study ID

NCT05684224

Start date

Dec 14, 2022

Status verified date

Mar, 2024

Completion date

Dec 31, 2024

Anticipated

Primary completion date

Dec 31, 2024

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18 - 30

Healthy Volunteers: Not accepted

Inclusion Criteria:

1. Age: Subjects who are 18 to 30 years old
2. Refractive error: Subjects with myopia between -1.00 and -5.00 D in each eye (n = 5), or hyperopia between +2.00 and +5.00 D in each eye (n = 5), determined by spherical equivalent using dry manifest refraction and binocular balance
3. Astigmatism <= 0.75 D in each eye
4. Anisometropia <= 1.50 D
5. BCVA at distance 20/20 in each eye
6. Habitual contact lens wears or willing to wear single vision and multifocal contact lenses during the 2nd study visit
7. Normal eye posture and accommodation
8. Good general and ocular health

Exclusion Criteria:

1. Strabismus at distance or near
2. Amblyopia
3. Significant anisometropia (>1.50 D)

Study Design

Enrollment

10 participants

Anticipated

Interventions and Outcome Measures

Interventions

Dynamic accommodation

Dynamic accommodation will be tracked using the Tobii Glasses

Primary outcome measure

  • Horizontal convergence [ Time Frame: Horizontal convergence during reading will be measured using the Tobii Glasses continuously for 5 minutes ]

Central Contacts and Locations

Central contacts

Xiaoying Zhu, OD, PhD, MD, MS, FAAO

2129385541xzhu@sunyopt.edu

Robert McPeek, PhD

212-938-5762rmcpeek@sunyopt.edu

Locations

Xiaoying Zhu

Recruiting

New York, New York, United States, 10036

Contacts

Xiaoying Zhu, OD, PhD, MD, MS, FAAO

2129385541xzhu@sunyopt.edu

Robert McPeek, PhD

212-938-5762rmcpeek@sunyopt.edu

More Information

Sponsor

State University of New York College of Optometry

Last update posted

Mar 22, 2024

Last verified

Mar, 2024

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by State University of New York College of Optometry on 2024-03-22.