~13 spots leftby Nov 2026

Spectacles for Lazy Eye

(SPECTRA Trial)

Recruiting in Palo Alto (17 mi)
+1 other location
BT
Overseen byBenjamin Thompson, PhD
Age: 18 - 65
Sex: Any
Travel: May Be Covered
Time Reimbursement: Varies
Trial Phase: Academic
Recruiting
Sponsor: Centre for Eye and Vision Research
Disqualifiers: Presbyopia, Bilateral amblyopia, Psychiatric disorders, others
No Placebo Group
Approved in 1 Jurisdiction

Trial Summary

What is the purpose of this trial?

Amblyopia is a developmental anomaly resulting from abnormal visual experiences in early life. Amblyopia causes reduced visual acuity in the absence of a pathology. Adult sensory systems are believed to be structurally invariant beyond early, critical periods of development. However, recent evidence suggest that visual functions in adults with amblyopia can be improved with optical correction alone. This study aims to investigate whether improvements in best corrected visual acuity and other visual functions can result following appropriate optical correction in adults with amblyopia. Functional measures relating to vision, binocular vision, and eye movements will be used to assess the efficacy of refractive correction for improving vision. This study will help us better understand the improvements in visual functions following optical correction, as well as the mechanisms underlying neuroplasticity in adults with amblyopia.

Will I have to stop taking my current medications?

The trial information does not specify whether you need to stop taking your current medications.

What data supports the effectiveness of the treatment for lazy eye using spectacles, optical correction, refractive correction, glasses, and contact lenses?

Research shows that correcting refractive errors with glasses can significantly improve vision in children with amblyopia (lazy eye) over a period of 4-24 weeks. This suggests that using spectacles or contact lenses to correct vision can be an effective part of treating lazy eye.12345

Is wearing spectacles or contact lenses safe for treating lazy eye?

Wearing contact lenses is generally safe for correcting vision problems, but there is a risk of eye infections if they are not used properly, such as sleeping in them. Spectacles (glasses) are a non-invasive option and are considered safe for vision correction.678910

How does the treatment of optical correction for lazy eye differ from other treatments?

Optical correction for lazy eye, using glasses or contact lenses, is unique because it directly addresses vision clarity by correcting refractive errors (issues with how the eye focuses light) without invasive procedures. Unlike other treatments that might involve surgery or eye patches, this method is non-invasive and can be easily adjusted or customized to the individual's needs.1112131415

Research Team

BT

Benjamin Thompson, PhD

Principal Investigator

Centre for Eye and Vision Research Limited

KW

Ken WS Tan, PhD

Principal Investigator

Centre for Eye and Vision Research Limited

Eligibility Criteria

This trial is for adults aged 18-39 with 'lazy eye' who have a specific difference in vision strength or astigmatism between their eyes. They must be generally healthy and have not received the optimal glasses prescription yet.

Inclusion Criteria

Difference of 1.00D or more between current refractive correction and study prescription
Good general health
I have a significant vision difference between my eyes or both misalignment and vision difference.
See 3 more

Trial Timeline

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Pre-intervention

Baseline measurements including visual acuity, fixation stability, and quality of life assessments

1 day
1 visit (in-person)

Intervention

Participants receive optical correction with spectacles and undergo regular assessments of visual functions

24 weeks
Every 4 weeks (in-person)

Post-intervention

Final assessments of visual acuity, fixation stability, and quality of life

1 day
1 visit (in-person)

Follow-up

Participants are monitored for any long-term changes in visual functions after the intervention

4 weeks

Treatment Details

Interventions

  • Optical Correction (Refractive Correction)
Trial OverviewThe study tests if wearing the right spectacles can improve vision in adults with amblyopia (lazy eye). It will measure changes in visual acuity, binocular vision, and eye movements to assess improvement.
Participant Groups
1Treatment groups
Experimental Treatment
Group I: Optical correctionExperimental Treatment1 Intervention
Prescription of spectacles for full-time wear to correct refractive error

Find a Clinic Near You

Who Is Running the Clinical Trial?

Centre for Eye and Vision Research

Lead Sponsor

Trials
3
Recruited
170+

The Hong Kong Polytechnic University

Collaborator

Trials
569
Recruited
78,000+

Dr. Loretta Fong

The Hong Kong Polytechnic University

Chief Medical Officer since 2023

MD from the University of Hong Kong

Prof. Jin-Guang Teng profile image

Prof. Jin-Guang Teng

The Hong Kong Polytechnic University

Chief Executive Officer since 2019

PhD in Structural Engineering from the University of Sydney

University of Waterloo

Collaborator

Trials
132
Recruited
221,000+

Findings from Research

In a study involving 107 children aged 3-7 with moderate amblyopia, both adhesive skin patches and over-glasses patches showed similar improvements in visual acuity after 17 weeks, indicating that both methods are effective treatments.
Over-glasses patching is a viable alternative for children who experience discomfort from adhesive patches, as it resulted in less redness of the eye or eyelids, making it a more comfortable option without compromising treatment efficacy.
Comparison between over-glasses patching and adhesive patching for children with moderate amblyopia: a prospective randomized clinical trial.Kim, SJ., Jeon, H., Jung, JH., et al.[2018]
Correcting refractive errors in amblyopic children can lead to significant improvements in visual acuity over 4-24 weeks, highlighting the importance of addressing vision issues before other treatments.
This study suggests that minimizing image blur through refractive correction may enhance the effectiveness of amblyopia treatment, potentially changing how clinicians manage refractive amblyopia.
Remediation of refractive amblyopia by optical correction alone.Moseley, MJ., Neufeld, M., McCarry, B., et al.[2019]
A new objective calculation method for LASIK surgery was developed, which customizes surgical corrections to help patients achieve emmetropia (perfect vision) and maximum visual acuity, based on a study of 187 eyes with myopia or myopic astigmatism.
The method proposes an optimal range for the final corneal radius for each eye, linking the position of this radius to the success of the surgery, thus providing a valuable reference for surgeons to improve their techniques.
[Optimization of an individualized LASIK surgery. Geometric ray tracing model].Ortiz, D., Saiz, JM., González, JM., et al.[2006]

References

Comparison between over-glasses patching and adhesive patching for children with moderate amblyopia: a prospective randomized clinical trial. [2018]
Monovision slows juvenile myopia progression unilaterally. [2018]
Remediation of refractive amblyopia by optical correction alone. [2019]
[Optimization of an individualized LASIK surgery. Geometric ray tracing model]. [2006]
Accommodation and its role in myopia progression and control with soft contact lenses. [2019]
Safety of soft contact lenses in children: retrospective review of six randomized controlled trials of myopia control. [2021]
Corneal Infections Associated with Sleeping in Contact Lenses - Six Cases, United States, 2016-2018. [2019]
Incidence of Intraoperative and Early Postoperative Adverse Events in a Large Cohort of Consecutive Laser Vision Correction Treatments. [2020]
Contact Lens Safety for the Correction of Refractive Error in Healthy Eyes. [2023]
10.United Statespubmed.ncbi.nlm.nih.gov
MiSight Assessment Study Spain: Adverse Events, Tear Film Osmolarity, and Discontinuations. [2018]
[Correction of presbyopia in users of video terminals by progressive half-spectacles]. [2006]
Vision tests on spectacle lenses and contact lenses for optical myopia correction: a pilot study. [2022]
13.United Statespubmed.ncbi.nlm.nih.gov
Mechanical design of a power-adjustable spectacle lens frame. [2019]
[Preliminary results of an algorithm for customized soft contact lens ablation]. [2019]
[The therapeutic contact lens--advantages and limits]. [2006]