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Wave designs tend to default to the 10 to 10.5mm range. Ortho k designs are typically larger at 0.2mm smaller than VID. But we don't stop there.

 

Using sophisticated algorithms, Wave creates designs for lenses as large as 18mm. Large diameter lenses can be spherical, toric or asymmetric. Below is an images showing edge lift on a 14.5mm lens on a post RK patient.

 

Edge Angle Fitting Method

 

Wave's innovative large diameter fitting method uses the measured lens edge angle to guide you with peripheral design. This is the angle between the edge and intermediate curve. The greater the angle, the closer it is to the cornea and vise versa. The known edge angle of the first dispensed lens guides your adjustments to the second lens. In the  example on the right, the angle is 25. With fluorescein, you decide if the lens is too tight or loose and then make the appropriate edge adjustment to increase or decrease the angle.

 

Use Wave's Trial Lens Feature

 

Edge angle fitting is complemented by Wave's custom trial lens option. You can avoid the expense of a full cost lens and instead order a reusable, plano trial lens. (Think of the trial lens as a warranty lens before the actual lens with power.) Evaluate the trial lens then make adjustments to your 'first' lens design with power. In the future you can reuse the LD trial lens with known edge angle with new patients. Find the angle that fits best and design the lens with that angle.

 

Click here to see an example of a Salzmann's Degeneration patient in Wave lenses.

 

 

 

Image courtesy of Peter Wilcox OD