The reproducibility of a new power mapping instrument based on the phase shifting schlieren method for the measurement of spherical and toric contact lenses.

Purpose: To assess a new method of power measurement of soft and rigid contact lenses. The method is the phase shifting schlieren method, as embodied in the Nimo TR1504 instrument.

Materials And Methods: Three Nimo TR1504 instruments were used to measure the power related dimensions of: (a) a range of custom toric rigid lenses; (b) a range of commercially available spherical hydrogel lenses; and (c) a commercially available range of toric silicone hydrogel lenses.

Empirical versus trial set fitting systems for accelerated orthokeratology.

Purpose: To compare the short-term clinical performance of two reverse-geometry rigid contact lens systems for accelerated orthokeratology with different fitting approaches and designs: an experimental lens that was fitted empirically (No. 7 Contact Lens Laboratory, Ltd.) and a more established lens using a trial set system, the BE lens (NKL).