Effects of Autostereoscopic 3D Visual Training on Binocular Vision Function of Myopes

Sun Yat-sen University

Status: Not yet enrolling

Conditions: Myopia

Treatments: Other: Visual training video

Study type: Interventional

Funder types: Other

Identifiers

NCT06266910

2023KYPJ320

Details and patient eligibility

About

This study intends to conduct a relatively comprehensive binocular visual function examination and follow-up on two groups of myopic subjects, one receiving autostereoscopic 3D vision training and the other receiving 2D vision training as a control. The aim is to explore the impact of autostereoscopic 3D vision training on the accommodation and convergence functions of myopes. Additionally, synchronized EEG-fNIRS signals will be collected to investigate whether changes in binocular visual function are accompanied by corresponding alterations in brain function.

Full description

The prevalence of myopia is increasing, posing a serious threat to our visual health. East Asia and Southeast Asia are high-prevalence areas for myopia, with over 80% of young people suffering from myopia. China has one of the highest rates of myopia globally. Preventing myopia occurrence and controlling its progression have become urgent public health issues.

Accommodative function may play an important role in the development of myopia. Studies indicate that factors such as hyperopic defocus caused by accommodation lag, prolonged near-plane fixation, and decreased accommodative flexibility may be associated with the occurrence and development of myopia. Convergence function works synergistically with accommodative function, and its impact on myopia is gradually gaining attention. Scientific and effective training methods to improve both accommodation and convergence functions might help slow down the progression of myopia.

Research by Huang et al. suggests that visual training based on autostereoscopic 3D display technology can improve accommodative lag and enhance accommodative flexibility. However, this study only explored the immediate effects of a single training session, and the long-term effects remain unknown. Furthermore, questions about how training induces changes in the convergence function, whether changes in accommodative function coincide with changes in the convergence function, etc., still need further investigation.

Therefore, this study intends to conduct a relatively comprehensive binocular visual function examination and follow-up on two groups of myopic subjects, one receiving autostereoscopic 3D vision training and the other receiving 2D vision training as a control. The aim is to explore the impact of autostereoscopic 3D vision training on the accommodation and convergence functions of myopes. Additionally, synchronized EEG-fNIRS signals will be collected to investigate whether changes in binocular visual function are accompanied by corresponding alterations in brain function.

Enrollment: 80 estimated patients

Sex: All

Ages: 18 to 30 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

1. Age 18 to 30 years

2. Refractive errors:

   spherical: -9.00 to -0.50 diopters (D), cylindrical: -2.50 to -0 D, and binocular difference within 2.0 D

3. Monocular best-corrected visual acuity ≥20/20

4. Normal stereoacuity

5. Participants capable of understanding the purpose of this study and providing informed consent

6. Participants capable of cooperating with relevant examinations.

Exclusion criteria

1. History of ophthalmic disease other than refractive error, such as strabismus, cataracts, glaucoma, retinal or optic nerve diseases
2. Use of any medications affecting accommodative function or wearing orthokeratology lenses in the past 1 month
3. History of ocular trauma or surgery
4. Suffering from systemic or mental illnesses.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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80 participants in 2 patient groups, including a placebo group

Three-dimensional (3D) viewing group

Experimental group

Description:

Participants in this group watch a 10-minute training video displayed in 3D mode, twice a day (totaling 20 minutes), five days a week, for four consecutive weeks.

Treatment:

Other: Visual training video

Two-dimensional (2D) viewing group

Placebo Comparator group

Description:

Participants in this group watched a 10-minute training video displayed in 2D mode, twice a day (totaling 20 minutes), five days a week, for four consecutive weeks.

Treatment:

Other: Visual training video