photorefractive keratectomy

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Related to photorefractive keratectomy: LASIK


excision of a portion of the cornea; kerectomy.
photorefractive keratectomy a procedure to correct errors of refraction in the eye by using an excimer laser to remove a portion of the anterior part of the cornea, which changes the refraction by creating a new radius of curvature.

pho·to·re·frac·tive ker·a·tec·to·my (PRK),

removal of part of the cornea with a laser to change its shape, and thus to modify the refractive error of the eye (reduce its myopia, for example).

photorefractive keratectomy (PRK)

a surgical procedure in which an excimer laser is used to reshape the human cornea to improve the refractive properties of the eye and reduce or eliminate the need for eyeglasses. The excimer laser does not require that incisions be made in the cornea. Rather than cutting, the laser shaves off preprogrammed outer layers of corneal tissue. The excimer laser is programmed to emit a measured and concentrated light beam to reshape a small part of the central cornea. It allows for correction of myopia of up to -10.0 diopters. See also refractive keratotomy. Compare radial keratotomy.
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Photorefractive keratectomy

photorefractive keratectomy

Ophthalmology A refractive surgery that corrects myopia by changing corneal conformation Results 78% vision improvement; 3-7% complications–eg, painful healing of cornea, glare. See Refractive surgery. Cf LASIK, Radial keratectomy.

pho·to·re·frac·tive ker·a·tec·to·my

(PRK) (fōtō-rĕ-fraktiv keră-tektŏ-mē)
Removal of part of the cornea with a laser to change its shape, and thus to modify the refractive error of the eye (e.g., to reduce its myopia).

Photorefractive keratectomy (PRK)

A procedure that uses an excimer laser to make modifications to the cornea and permanently correct myopia.
Mentioned in: Myopia, Radial Keratotomy

keratectomy, photorefractive

A surgical procedure on the cornea aimed at correcting ametropia. The epithelium is completely removed over a central diameter of about 7 mm and excimer laser ablation is then carried out on the stroma. A bandage soft contact lens is usually worn afterwards for a few days while the epithelium regenerates. Complications are more common than with either LASEK or LASIK. Useful vision recovers more slowly and pain lasts longer than with the latter procedures. Syn. keratorefractive surgery; laser refractive keratoplasty (LRK); refractive keratoplasty. See corneal ectasia; radial keratotomy.
References in periodicals archive ?
Masked comparison of silicone hydrogel lotrafilcon A and etafilcon A extended wear bandage contact lenses after photorefractive keratectomy.
Long-term Outcomes of Photorefractive Keratectomy for Low to High Myopia: 13 to 19 Years of Follow-Up.
Wavefront-guided laser in situ keratomileusis (Lasik) versus wavefront-guided photorefractive keratectomy (Prk): a prospective randomized eye-to-eye comparison (an American Ophthalmological Society thesis .
Spherical aberration after laser in situ keratomileusis and photorefractive keratectomy.
An in vivo investigation of the structures responsible for corneal haze after photorefractive keratectomy and their effect on visual function.
LASIK Advantage will cover various types of LASIK procedures, as well as Photorefractive Keratectomy (PRK) procedures.
LASIK is an elective procedure with the alternatives including but not limited to eyeglasses, contact lenses, photorefractive keratectomy (PRK), and other refractive surgeries.
In April 2005, Inspire began enrolling patients in a Phase 2 pilot clinical trial designed to evaluate the efficacy of diquafosol tetrasodium ophthalmic solution 2% versus placebo in improving corneal wound healing following photorefractive keratectomy (PRK) surgery.
McDonald has been the principal investigator of three National Eye Institute grants for the study of refractive surgery: radial keratotomy (at the LSU Clinical Center for the Prospective Evaluation of Radial Keratotomy (PERK) study), epikeratophakia, and excimer laser photorefractive keratectomy, as well as numerous industrial grants.
ophthalmologists at the Toronto facility in photorefractive keratectomy, or PRK, the initial procedure approved by the FDA.
The procedures performed at their centers consist primarily of Laser In-Situ Keratomileuis ("LASIK") and Photorefractive Keratectomy ("PRK") surgeries.