| They have also been approved for photorefractive keratectomy, but only to treat certain degrees of nearsightedness and some forms of astigmatism. |
| They have been approved for phototherapeutic keratectomy, which is used to treat diseased, scarred corneas. |
| Implants would serve as a less permanent alternative to corrective surgical techniques such as radial keratotomy or photorefractive keratectomy. |
| The pulsed laser is used also in keratectomy. |
| These corneal sculpting techniques are known as photorefractive keratectomy and in situ keratomileusis. |
| Photorefractive keratectomy evolved concurrently with the development of laser technology within refractive surgery. |
