Treatment of corneal surface irregularities using biomask as an adjunct to excimer laser phototherapeutic keratectomy.

Purpose: To assess the clinical changes induced by the use of BioMask as an adjunct to phototherapeutic keratectomy (PTK) using the excimer laser.

Methods: A nonrandomized, prospective clinical trial was conducted. Twenty-two consecutive patients were enrolled for BioMask treatment with reduced visual acuity caused by irregular astigmatism or corneal scarring.

Excimer laser in situ keratomileusis.

We have been using a 193-nm excimer laser under protocol to ablate the corneal stromal bed after creating a hinged corneal flap with a microkeratome in order to reduce or eliminate refractive error. Thirty-one consecutive eyes are reviewed with a preoperative mean spherical equivalent refraction of -6.25 diopters (D) (range -3.