Extending Treatment Duration in Perceptual Learning for Amblyopia

Area of Science:

• Ophthalmology
• Neuroscience
• Vision Science

Background:

• Perceptual learning (PL) is an emerging therapeutic strategy for amblyopia.
• This study investigates the impact of extended PL duration on amblyopia treatment outcomes.

Purpose of the Study:

• To evaluate if extending the duration of perceptual learning (PL) provides sustained therapeutic benefits for amblyopia.
• To identify factors influencing visual function improvements in amblyopia patients undergoing PL.

Main Methods:

• Retrospective observational study of 93 patients who completed 6-month lateral masking PL.
• Longitudinal changes in best-corrected visual acuity (BCVA), contrast sensitivity function (CSF), and stereopsis were analyzed using linear mixed-effects models.
• Multivariable linear regression identified factors associated with BCVA and area under the log CSF (AULCSF) improvements.

Main Results:

• Significant and sustained improvements were observed in BCVA and AULCSF after 6 months of PL.
• Near stereopsis improved with 3 months of PL, but further gains were not significant with extended training.
• Baseline visual function and prior occlusion therapy history were key predictors of BCVA and AULCSF improvement.

Conclusions:

• Perceptual learning (PL) effectively enhances visual function in amblyopia patients.
• A 6-month duration of PL treatment is suggested to be necessary for achieving measurable visual improvements and sustained benefits.