Photo-Refractive Keratectomy (PRK)
Photo-Refractive Keratectomy (PRK) is an alternate laser procedure for patients who have thin corneas where LASIK may not leave enough residual tissue behind.
During PRK, surgeons utilize the same excimer laser used during iLASIK but a flap is not created. Instead of a 110-micron flap, only the top 50 microns of the surface are removed. PRK is a quick, comfortable procedure, and is performed on-site in our convenient outpatient excimer laser suite. Topical anesthetic eye drops are first used to fully numb the eye. Next, the protective surface (epithelial) layer of the cornea is gently loosened and removed. Seconds later, the excimer laser reshapes the corneal tissue to the correct focusing power. Once the procedure is complete, a protective contact lens bandage is placed over the cornea to allow for comfortable healing. Generally, complete healing of the epithelium is achieved in 3-5 days.
Many PRK patients notice improvement only a short time after the procedure. However, vision often blurs over the following few days as the epithelial healing process forms a little ridge near the center of the cornea. Over the next few weeks as the eyelid blinks, it will smooth out the central ridge and the vision will gradually get much sharper. Many PRK patients prefer to have one eye treated at a time, separated by a two-week-long healing period.
Implantable Contact Lens (ICL)
The implantable contact lens (ICL) is a refractive procedure where the surgeon places a lens inside the eye to help correct refractive error, such as high myopia (nearsightedness). The ICL is an alternative procedure to IntraLASIK, PRK, and Refractive Lens Exchange. Candidates for the ICL procedure usually range between 19 to 45 years old, with moderate to severe myopia.
The ICL is able to achieve stable, dependable results, and outstanding quality of vision. Although it is designed to remain in place within the eye without the need for maintenance, an ICL can be removed and replaced in the event a patient undergoes refractive changes over time. Because the ICL site is behind the eye’s iris, it is not visible to either patient or observer without clinical examination. The material of the ICL consists of the biocompatible collagen copolymer to prevent any adverse reactions inside the eye. It also contains a UV filter.
ICLs are a great refractive surgery option for patients who are near-sighted (between –2D and –20D) with limited amounts of astigmatism. The ICL is preferred for patients who have thinner or weaker corneas or for patients with extremely dry eyes. The Visian ICL has been successfully implanted in over 55,000 eyes worldwide. Over 99% of patients in the clinical trial were satisfied with their vision after the procedure.
One of the great benefits of the Visian Implantable Collamer lens is its lack of any structural changes to your eye with this procedure; we simply change your vision without changing your eye. The procedure is reversible. The lens is made of a collagen copolymer that is very biocompatible (doesn’t cause a reaction inside the eye) and can be removed if necessary.