Dr. Zhi (Peter) Chen

Speaker：

Dr. Zhi (Peter) Chen

Institution：

Fudan University Eye and ENT Hospital in Shanghai

Position：

Attending Physician 

Presentation Title：

Myopia control in orthokeratology – where is the latest evidence taking us to?

Abstract：

Previous studies have shown a significant individual variability in myopia control effect in children undergoing orthokeratology (ortho-k) treatment. Cumulative evidence indicated that the ortho-k lenses with smaller optic zone (OZ) had a potential for better myopia control. Analysis using mathematical methods revealed a more aspheric treatment zone (TxZ) in those lens designs with smaller OZ. Two prospective studies using different lens designs both showed that, among all the optical variables including TxZ size, amount of mid-peripheral corneal steepening, asphericity of TxZ, the asphericity of TxZ is the most critical parameter responsible for axial elongation reduction in ortho-k. Future ortho-k lens designs should focus on creating a more aspheric optics in the TxZ rather than on the other parameters.