The Effects of CAM Vision Stimulator for Bilateral Amblyopia of Different Etiologies

Bacground: To evaluate the association between bilateral amblyopia and the effects ofCAM vision stimulator.Methods: This retrospective study was carried out between January 1994 and July2004. The 105 children enrolled were all younger than 7 years old and hadbilateral amblyopia. All children wearing full-correction glasses regularlyreceived CAM vision stimulation once per week. The patients’ age, initialbest corrected visual acuity (BCVA), final BCVA, and the number of CAMsessions needed to achieve a visual acuity (VA) ≥ 0.8 were recorded.Results: The major cause of bilateral amblyopia was refractive error. In this study, thetypes of refractive error were classified as astigmatism (> 2.0D, 61 cases),hyperopia (> 3.0D, 17 cases), and myopia (> 4.0D, 12 cases). The myopicgroup showed significantly poorer visual outcomes than the other childrenafter CAM treatment (p < 0.05). However, older children patients had betterinitial BCVA, and the hyperopic patients had the better outcomes in thisstudy.Conclusions: CAM treatment for bilateral amblyopia can achieve satisfactory improvementin 3 months in most instances. The myopic group and children youngerthan 4 years old had worse visual outcomes after CAM treatment.