AzTrials
AzTrials

Amblyopia UnilateralNCT06498206

AR Training Versus Patching in Unilateral Amblyopia

A study testing AR training and Patching in people with Amblyopia Unilateral, run by Eye & ENT Hospital of Fudan University at 1 site in China.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
Search all trials

Trial summary

This is a multi-center, randomized controlled trial to compare the effectiveness of AR training with patching for the treatment of unilateral amblyopia. Specific Aim 1 (Primary): To compare the improvement of visual acuity in the amblyopic eye between AR training and patching for the treatment of unilateral amblyopia. Read more about this study

Who is it for?
Ages 5 to 55 years
Conditions the study is for
Amblyopia Unilateral
What is being tested?
AR training and Patching
Could I receive a placebo?
No, everyone receives an active treatment
How many people
114 participants
Where
1 siteChina
Study dates
31 Aug 2024to Dec 2025
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 5 to 55 years
  • All sexes
  • No healthy volunteers
  • Child, Adult

Who may be able to join

  • Aged 5-55 years (including 5 years and 55 years);
  • Best-corrected visual acuity worse than 20/30 but no worse than 20/200 in the amblyopic eye, interocular difference of 2 or more lines, with the better eye within the normal range;
  • Patients have applied optical refractive correction for more than 3 months;
  • Ability attend visits and complete the treatment;
  • Normal binocular alignment including strabismic amblyopia with orthotropia after surgical correction, or intermittent exotropia within a range of -15 to 0 prism diopters measured by the prism cover test.

Who cannot join

  • Organic eye diseases preventing the establishment of good vision (e.g. ptosis, media opacity, nystagmus, paracentral fixation, acute inflammation like keratitis, optic nerve diseases like glaucoma, retinal diseases);
  • Lesions of the brain preventing the establishment of good vision (e.g. cortical visual impairment);
  • Implantable electronic device;
  • A history of ocular surgery (except strabismus surgery) affecting vision (e.g. retinal detachment repair);
  • A history of ocular trauma affecting vision;
  • Receiving amblyopia therapy (except wearing glasses) within 2 weeks prior to presentation;
Show all 10Show fewer
  • History of epilepsy or mental illness, or cognitive defects;
  • Currently taking medications or needing to take medications during the study period that may affect vision;
  • Inability to comply with the treatments or follow-up visits required;
  • Participation in clinical trials on drugs within 3 months prior to presentation, or clinical trials on other medical devices within 30 days prior to presentation.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

Wen Wen, MD, PhD contact

86+(021)34233133

wenweneye@126.com

Yulian Zhou, MD contact

zyl_1208@163.com

China1 site, 1 recruiting
  • Eye & ENT Hospital of Fudan University

    Shanghai

    Wen Wen, MD, PhD, 86+(021)34233133‬, wenweneye@126.com

    Wen Wen

    Recruiting

Other trials in China

About this study

Official title: Dichoptic Augmented Reality (AR) Training Versus Patching for Unilateral Amblyopia in Children and Adults

This is a multi-center, randomized controlled trial to compare the effectiveness of AR training with patching for the treatment of unilateral amblyopia.

Specific Aim 1 (Primary): To compare the improvement of visual acuity in the amblyopic eye between AR training and patching for the treatment of unilateral amblyopia.

Specific Aim 2 (Secondary): To compare the improvement of visual functions between AR training and patching for the treatment of unilateral amblyopia.

Read the detailed description

Poor compliance, limited improvement of visual functions, and regression after recovery of visual acuity have been observed in the management of amblyopia using conventional patching. Recently, dichoptic/binocular digital therapy has been developed, but no widely accepted binocular treatments with superiority available for children and adults with amblyopia (Pineles et al., 2020; Oscar et al., 2023). Here, we designed an innovative binocular therapy using augmented reality (AR) training, based on neural deficits in amblyopia, to achieve better outcomes.

Selective deficits were found in the parvocellular pathway (P pathway) compared to the magnocellular pathway (M pathway) in the monocular processing of visual information in the amblyopic eye (AE) (Wen et al., 2021). In addition to monocular deficits, imbalanced binocular suppression may also play important roles in the visual deficits of amblyopia as suggested by clinical evidence (DeSantis, 2014; Von Noorden, 1996) and psychophysical studies (Baker et al., 2008; Holopigian et al., 1988; Li et al., 2011; Zhou et al., 2013). Based on the neural deficits in unilateral amblyopia, we first apply the push-pull approach (Xu, He \& Ooi, 2010; Ooi et al., 2013), which was aimed to reduce sensory eye dominance in previous literatures, into the rebalance of functions of M and P pathways in the AE and the rebalance of binocular interaction, to improve the high spatial detail perception of the AE in daily life under binocular viewing condition, as well as binocular functions.

Using AR technique combined with dichoptic device, we present differentially-processed images to each eye of the patients in real time, allowing them to interact with the surrounding environment during the visual training. Using a Butterworth filter with the cutoff at 2 cycle pre degree, the images captured in real time are divided into information with high and low spatial frequencies (SFs) corresponding to the P and M pathways, respectively. For the AE, original low SF phase of captured images is scrambled into random noise with the refresh rate of the display, while the original information with high SF is retained completely. As a result, the function of the P pathway is pulled while the function of the M pathway is pushed, actively encouraging the interaction with the surrounding environment through high SF information. For the fellow eye (FE), original high SF phase of captured images is scrambled into random noise with increased contrast and reduced temporal frequency, while the contrast of the original high SF information is reduced. As a result, in addition to the push-pull in monocular P\&M pathways, the function of the P pathway in the FE is pulled and while the function of the P pathway in the AE is pushed, actively improving the rebalance of binocular inhibition.

The proposed trial will be conducted in 4 different study sites in China. For the AR training group, patients need to perform AR training for 2 hours per day at home. For the patching group, patients need to patch the FE for 2 hours per day at home.

Being tested
AR training, Patching
Keywords
Augmented reality training, Dichoptic therapy, Patching

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • AR trainingOther

    Dichoptic augmented reality training with dual-pathway (parvocellular pathway and magnocellular pathway) and interocular push-pull paradigms developed based on neural deficits in unilateral amblyopia.

  • PatchingOther

    Conventional patching therapy.

Study groups in NCT06498206
Study groupRoleWhat they receive
AR training groupExperimentalDichoptic augmented reality training with dual-pathway (parvocellular pathway and magnocellular pathway) and interocular push-pull paradigms developed based on neural deficits in unilateral amblyopia.
Receives: Other: AR training
Patching groupActive comparatorConventional patching therapy.
Receives: Other: Patching

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Total effective rate

    The effective rate is defined as the proportion of patients whose best-corrected visual acuity (BCVA) at distance improved ≥0.2 LogMAR after treatment compared to the baseline. BCVA at distance is measured with ETDRS chart.

    Measured: 13 weeks

Secondary outcomes (7)
  1. Change in best-corrected visual acuity

    Best-corrected visual acuity is measured with cycloplegic refraction, using ETDRS chart.

    Measured: 2 weeks, 4 weeks, 9 weeks, 13 weeks

  2. Effective rate

    The effective rate is defined as the proportion of patients whose best-corrected visual acuity (BCVA) at distance improved ≥0.2 LogMAR after treatment compared to the baseline. BCVA at distance is measured with ETDRS chart.

    Measured: 2 weeks, 4 weeks, 9 weeks

  3. Change in habitual visual acuity

    Habitual visual acuity is measured under habitual refractive correction at a viewing distance of 4 meters, using ETDRS chart.

    Measured: 2 weeks, 4 weeks, 9 weeks, 13 weeks

  4. Change in stereopsis

    Near and far stereopsis measured with Randot Stereotest pattern.

    Measured: 2 weeks, 4 weeks, 9 weeks, 13 weeks

  5. Change in contrast sensitivity

    Contrast sensitivity in each eye measured with contrast sensitivity testing instrument CSV-1000®.

    Measured: 2 weeks, 4 weeks, 9 weeks, 13 weeks

  6. Compliance rate

    Compliance rate is measured by daily card in the patching group and by background recording in the AR training group.

    Compliance Rate (%) = (Completed Treatment Days / Scheduled Treatment Days) × 100

    Measured: 2 weeks, 4 weeks, 9 weeks, 13 weeks

  7. Safety reports

    Assessment of the types (adverse event, serious adverse event, device deficiency), incidence rate (%), and frequency (number of events) of adverse events and device-related adverse events occurring during the clinical trial.

    Measured: 2 weeks, 4 weeks, 9 weeks, 13 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted12 Jul 2024
  2. Study start31 Aug 2024
  3. Primary completionAug 2025 (estimated)
  4. Study completionDec 2025 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Single blind
Who is masked
Outcomes assessor
Enrolment
114 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06498206
Sponsor's protocol ID
2024-ARTA
Status last verified
Apr 2025
First submitted
7 Jul 2024
Last updated
10 Apr 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: We concerns about patient privacy issues and it's better to protect the publication potential.

Publications

  • Pineles SL, Aakalu VK, Hutchinson AK, Galvin JA, Heidary G, Binenbaum G, VanderVeen DK, Lambert SR. Binocular Treatment of Amblyopia: A Report by the American Academy of Ophthalmology. Ophthalmology. 2020 Feb;127(2):261-272. doi: 10.1016/j.ophtha.2019.08.024. Epub 2019 Oct 13.

    PubMed 31619356
  • Cruz OA, Repka MX, Hercinovic A, Cotter SA, Lambert SR, Hutchinson AK, Sprunger DT, Morse CL, Wallace DK; American Academy of Ophthalmology Preferred Practice Pattern Pediatric Ophthalmology/Strabismus Panel. Amblyopia Preferred Practice Pattern. Ophthalmology. 2023 Mar;130(3):P136-P178. doi: 10.1016/j.ophtha.2022.11.003. Epub 2022 Dec 14. No abstract available.

    PubMed 36526450
  • Wen W, Wang Y, Zhou J, He S, Sun X, Liu H, Zhao C, Zhang P. Loss and enhancement of layer-selective signals in geniculostriate and corticotectal pathways of adult human amblyopia. Cell Rep. 2021 Dec 14;37(11):110117. doi: 10.1016/j.celrep.2021.110117.

    PubMed 34910903
  • DeSantis D. Amblyopia. Pediatr Clin North Am. 2014 Jun;61(3):505-18. doi: 10.1016/j.pcl.2014.03.006. Epub 2014 Apr 14.

    PubMed 24852148
  • Von Noorden GK. Binocular vision and ocular motility. Theory and Management of Strabismus. 1996.

  • Baker DH, Meese TS, Hess RF. Contrast masking in strabismic amblyopia: attenuation, noise, interocular suppression and binocular summation. Vision Res. 2008 Jul;48(15):1625-40. doi: 10.1016/j.visres.2008.04.017. Epub 2008 Jun 10.

    PubMed 18547600
  • Holopigian K, Blake R, Greenwald MJ. Clinical suppression and amblyopia. Invest Ophthalmol Vis Sci. 1988 Mar;29(3):444-51.

    PubMed 3343099
  • Li J, Thompson B, Lam CS, Deng D, Chan LY, Maehara G, Woo GC, Yu M, Hess RF. The role of suppression in amblyopia. Invest Ophthalmol Vis Sci. 2011 Jun 13;52(7):4169-76. doi: 10.1167/iovs.11-7233.

    PubMed 21447685
  • Zhou J, Huang PC, Hess RF. Interocular suppression in amblyopia for global orientation processing. J Vis. 2013 Apr 22;13(5):19. doi: 10.1167/13.5.19.

    PubMed 23608341
  • Xu JP, He ZJ, Ooi TL. Effectively reducing sensory eye dominance with a push-pull perceptual learning protocol. Curr Biol. 2010 Oct 26;20(20):1864-8. doi: 10.1016/j.cub.2010.09.043. Epub 2010 Oct 14.

    PubMed 20951044
  • Ooi TL, Su YR, Natale DM, He ZJ. A push-pull treatment for strengthening the 'lazy eye' in amblyopia. Curr Biol. 2013 Apr 22;23(8):R309-10. doi: 10.1016/j.cub.2013.03.004.

    PubMed 23618663
  • Zhou Y, Guo S, Ling L, Gao Y, Duan X, Liu Y, Liu R, Liu H, Wang H, Lin J, Zhao C, Zhang P, Wen W. Efficacy and safety of augmented-reality pathway-specific binocular training in patients with unilateral amblyopia (ARPSBT): study protocol for a multicenter randomized controlled trial. Trials. 2025 Jul 1;26(1):232. doi: 10.1186/s13063-025-08927-2.

    PubMed 40598549

Questions about this trial

What is this clinical trial studying?

A study testing AR training and Patching in people with Amblyopia Unilateral, run by Eye & ENT Hospital of Fudan University at 1 site in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 5 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 10 Apr 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Wen Wen, MD, PhD (86+(021)34233133, wenweneye@126.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Total effective rate (time frame: 13 weeks). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06498206, which also lists 12 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 10 Apr 2025.

Free account

Keep searching with a free account

You’ve used your 3 free searches for this session. Log in or create a free AzTrials account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in