You have carefully selected your patient, taken the necessary measurements, ordered the lenses and now they have arrived in your practice (read part one of our guide). What happens next?
Lens collection
The collection of orthokeratology (from now on referred to as ortho-k) lenses is very similar to the collection of ‘standard’ rigid gas permeable (RGP) lenses. Firstly, the parameters on the label are confirmed to match the order (Figure 1). Then, on insertion, there are a number of points where the process may differ:
Material and colour
During the collection appointment, the lenses should be worn for about 30 minutes so the fit can be checked with fluorescein (Figure 2). An ideal fit would be:
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