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Steven A Greenstein

Peter S Hersh

John D Gelles

Corneal augmentations designed for the amelioration of an abnormality of a cornea and methods of using them are disclosed. The corneal augmentations are shaped from corneal templates. The required arcuate 3-D shapes of the corneal augmentations are determined based on elevation maps of the cornea as well as measurements of a severity of the abnormality such as the maximum keratoconus, K-max. Shaping of the corneal augmentation is done using computer-controlled femtosecond lasers and laser ablation.

Devices for the amelioration of an abnormality of a cornea and methods of using them

Methods for the amelioration of ectatic corneal disorders using corneal augmentations are disclosed. The shape of the augmentation is determined using data obtained from mapping of a patient's cornea based on computerized corneal topography and tomography. Factors considered include the maximum keratometry and specific iso-deviation contours. In one embodiment, an augmentation is inlayed into a femtosecond created, intrastromal pocket. In a further embodiment, an onlay augmentation is positioned over a region of the cornea from which the epithelial layer has been removed. The onlay is held in place by glue, sutures, tucking under a perimeter chamfer, or some combination thereof, until the epithelial layer regrows over the augmentation. In a further embodiment, the inlay or only augmentation is followed by a post-augmentation, further reshaping of the corneal augmentation. In one embodiment, this further reshaping is photorefractive keratectomy (PRK) surgery. In another and a phototherapeutic keratectomy (PTK) surgery.

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Teaneck, NJ, United States of America

Steven A Greenstein