New system for postoperative IOL refraction adjustment

A company based in California (Perfectlens LLC) is developing new approach to the postoperative adjustment of an intraocular  lenses , said Josef Bille MD, Perfectlens LLC Vice President, at the XXXIII Congress of the ESCRS in Barcelona.

Dr Bille noted that the process causes a change of the hydrophilic its within the lens to cause a negative refractive index change in the exposed area. In this way it is possible to create a lens within a lens with range of possible optical properties, including aspheric its and toricity which can be finely adjusted within the patient’s eye.

The Perfectlens system includes a laser (MaiTai HP, Spectra Physics), an AOM (Gooch and Housego), a 2D scan system (Newson), ultra-precise 3D linear motor setup and a high numerical aperture microscope. 

In a separate presentation, Ruth  Sahler, Perfectlens Vice President and COO, noted that they have used the system for  the photo-induced, refractive index change to create a 

Fresnel-like  custom spherical aberration inside a standard acrylic hydrophobic intraocular lens (EC-1Y, Zeiss). 

She added that although the experiments were carried out in a  laboratory setting, the lens modifications were performed  in a manner which comply with applicable laser safety 

regulations. The internal lens-shaping process takes only five seconds. She and her associates are now in the process of developing an interface for use in humans 

and animal trials are likely to start soon.