Efficacy Study of Different Lens Treatments on Chinese Adolescent Myopia

Randomized Controlled Trial of Different Lens Treatments on Chinese Adolescent Myopia

The purpose of this study is to determine the efficacy of different lens treatments (normal spectacle lens, ortho-K, & Myovision) on myopia control in Chinese adolescent patients.

Different lens treatments include normal spectacle lens, orthokeratology, and Myovision (a specially designed spectacle lens commercially available with peripheral defocus controlled as relative myopia).

This study is to evaluate the efficacy of these three methods in controlling myopia progression. Until now, there is no sufficient clinical evidences to compare different lens treatments.

Inclusion Criteria:

• Adolescent myopia patients
• Myopic refraction between -1.00D and -4.50D
• Astigmatism equal or less than -1.50D
• Normal break up time of tear film (BUT > 10s)

Exclusion Criteria:

• Existence of any ocular diseases except ametropia
• Hyperopia
• Severe dry eye