This comparison looks at one of Oasys' competitors - Coopervision Avaira. This 2 week lens was introduced in April 2008. So, is Avaira an alternative to Oasys? This comparison chart highlights the differences.

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Conclusion:

We are tempted to call it a tie. Both lenses show impressive parameters. The new Avaira gets points on price, however Oasys clearly has a '3 years in the market' advantage, a higher Dk and Dk/t value and there is a multifocal version available.

Both lenses come with UVA and UVB blocking (not many contact lens manufacturers offer this feature) with Oasys getting points on better UVA blocking.

Also, both lenses provide a unique wetting agent solution promising a higher level of wearing comfort; Vistakon calls it Hydraclear and CooperVision calls it Aquaform.

Last not least Oasys comes in multiple base curves and offers a much wider range of available powers (at least for now). It will be interesting whether Coopervision will be able to convince Oasys users to switch over. We believe Avaira might be more of an upgrade alternative for Biomedics or Vertex users.