Related Experiment Video
Updated: Jun 25, 2026
Stereoacuity Improvement using Random-Dot Video Games
Published on: January 14, 2020
The effects of CAM vision stimulator for bilateral amblyopia of different etiologies
Hsiu-Mei Huang1, Hsi-Kung Kuo, Po-Chiung Fang
1Department of Ophthalmology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan.
Insights
CAM vision stimulation effectively treats bilateral amblyopia in children under 7. However, myopic children and those younger than 4 experienced poorer visual outcomes with this treatment.
Area of Science:
- Ophthalmology
- Pediatric Optometry
- Vision Science
Background:
- Bilateral amblyopia affects visual development in children.
- Understanding treatment efficacy for amblyopia is crucial.
Purpose of the Study:
- To evaluate the effectiveness of the CAM vision stimulator for treating bilateral amblyopia.
- To identify factors influencing treatment outcomes in children.
Main Methods:
- Retrospective study of 105 children under 7 with bilateral amblyopia.
- Children received weekly CAM vision stimulation with full-correction glasses.
- Data collected included initial and final visual acuity (VA) and number of sessions.
Main Results:
- Refractive error was the primary cause of amblyopia, including astigmatism, hyperopia, and myopia.
- The myopic group showed significantly poorer visual outcomes (p < 0.05) after CAM treatment.
- Older children and hyperopic patients demonstrated better initial visual acuity and outcomes, respectively.
Conclusions:
- CAM treatment offers satisfactory improvement for bilateral amblyopia within 3 months for most patients.
- Myopic children and those under 4 years old had worse visual outcomes with CAM treatment.
- Age and refractive error type are important factors in CAM treatment success.
Background:
To evaluate the association between bilateral amblyopia and the effects of CAM vision stimulator.
Methods:
This retrospective study was carried out between January 1994 and July 2004. The 105 children enrolled were all younger than 7 years old and had bilateral amblyopia. All children wearing full-correction glasses regularly received CAM vision stimulation once per week. The patients' age, initial best corrected visual acuity (BCVA), final BCVA, and the number of CAM sessions needed to achieve a visual acuity (VA) > or = 0.8 were recorded.
Results:
The major cause of bilateral amblyopia was refractive error. In this study, the types of refractive error were classified as astigmatism (> 2.0D, 61 cases), hyperopia (> 3.0D, 17 cases), and myopia (> 4.0D, 12 cases). The myopic group showed significantly poorer visual outcomes than the other children after CAM treatment (p < 0.05). However, older children patients had better initial BCVA, and the hyperopic patients had the better outcomes in this study.
Conclusions:
CAM treatment for bilateral amblyopia can achieve satisfactory improvement in 3 months in most instances. The myopic group and children younger than 4 years old had worse visual outcomes after CAM treatment.
