A study showed that posterior chamber phakic IOL implantation treated myopia and astigmatism in patients who underwent previous penetrating keratoplasty (PK). The prospective study included 15 eyes of 15 patients with a mean age of 37.8 years who underwent previous PK and were unable to wear spectacles or contact lenses or to undergo corneal refractive surgery.

In a first research of its kind, the Swiss-based Peschke Meditrade GmbH has initiated a investigation to study the benefits of corneal collagen cross-linking (CXL) in subjects with progressive keratoconus and corneal ectasia after prior refractive surgery. Presently keratoconus is treated through eyeglasses, hard contact lenses, and a newer treatment, INTACS plastic rings inserted into the mid layer of the cornea to flatten it, changing the shape and location of the cone. In 15-20% of the cases, cornea transplant surgery is necessary.