Laser Vision Correction

Get clear, sharp vision

Patrick Leahey, MD, has been perforiming laser vision correction since 1996 for myopia (nearsightedness). Now the excimer laser can correct astigmatism and hyperopia (farsightedness). Two common procedures performed with the excimer laser are LASIK and PRK.

Who is a candidate for PRK or Lasik with the VISX laser system?

  • -1.00 to -14.50 diopters of myopia (nearsightness)
  • 0.5 to 5.00 diopters of astigmatism
  • Up to +6.00 diopters of hyperopia (farsightedness)

Lasik eye surgery

The Excimer laser reshapes the cornea to reduce or eliminate the need for glasses or contact lenses in cases of myopia (nearsightedness) or hyperopia (farsightedness) and astigmatism. The curvature of the eye must be reshaped in these situations. There are two ways this can be accomplished with the lase – on the surface with PRK (photorefractive keratectomy) or beneath the surface with LASIK Eye Surgery.

LASIK eye surgery for nearsightedness

To treat nearsightedness, the cornea must be made flatter. This is accomplished by removing tissue from the center of the cornea

LASIK eye surgery for farsightedness

To treat farsightedness, the central cornea must be made steeper. This is accomplished by directing the laser beam to remove tissue from around this area.

LASIK eye surgery for astigmatism

To treat astigmatism, the cornea must be made more spherical. By changing the pattern of the beam, tissue is removed in one direction more than the other.

Patient testimonial

Joe Maloy is a member of USA Triathlon’s national team. He is the 2014 US National Triathlon Champion. He’s competed professionally since 2010 and recorded top finishes internationally on 5 of the 7 continents.

He underwent Dr. Leahey’s LASIK Eye Surgery procedure in 2011 and has greatly benefited from the freedom LASIK afforded him in both his competitions and his daily life.

“Deciding to undergo the LASIK Eye Surgery procedure with Dr. Leahey was one of the best decisions I’ve ever made. I trusted his experience and his professionalism, and I would not hesitate to do it again. I walked into the room blind as a bat, and I walked out with 20/15 vision. After having the procedure in 2011, I have enjoyed a freedom that my life with contacts would have never allowed.”

Photorefractive keratectomy (PRK)

Photorefractive keratectomy (PRK) is a procedure that is approved by the FDA to treat mild to moderate degrees of myopia, hyperopia and/or astigmatism. It is a surface ablation technique that is an alternative to LASIK for certain individuals.

NearVision CK

NearVisioin CK (conductive keratoplasty) is an FDA-approved procedure for temporary hyperopic correction (farsightedness) andpresbyopia (near vision).

  • In-office procedure.
  • No laser used
  • No flap created
  • Radiofrequency probe
  • No surgery on central cornea

Candidates for Conductive Keratoplasty

Good candidates for CK to correct farsightedness:

  • +0.75 to +3.25 diopters of hyperopia
  • Less than 0.75 diopters of astigmatism
  • Age 40 or older

Good candidates for CK to correct nearsightedness:

  • Minimal or no distance correction required
  • Currently use glasses just for near vision tasks
  • Age 40 or older

NearVision CK Procedure

Using a probe thinner than a strand of human hair, radio waves are applied in a circular pattern to shrink small areas of corneal tissue.

The circular treatment pattern acts like a belt tightening around the cornea, increasing its overall curvature to correct farsightedness.

Although the goal of CK is to improve vision to the point of not being dependent on glasses or contact lenses or to the point of wearing thinner (or weaker) glasses, this result is not guaranteed. Dr. Leahey uses a device known as the Viewpoint CK System to perform CK.

CK is one of a number of alternatives for correcting farsightedness. The CK treatment utilizes a controlled release of radiofrequency (RF) energy to increase the temperature of corneal tissue. The treatment is applied with a probe that is introduced 8 to 32 times into the cornea in a circular pattern, which results in an increased curvature of the cornea to correct your vision.

The correction you achieve from CK may be temporary. The surgery is performed using a topical anesthetic (drops in the eye) under a microscope. Due to the use of anesthetic drops, there should be little to no pain or discomfort during this procedure.

Prisma Health Eye Institute

Call us: 864-522-3900

Spartanburg: 864-515-7588

Easley: 864-522-3970


“W.O.W. – seeing for the first time in my life is unbelievable! LASIK surgery was simple, painless and effective. I had a lot confidence in Dr. Leahey and he performed his skills with ease and confidence. Having my wife, Liz, accompanying me and seeing her first after the procedure was awesome! Thanks to everyone involved.” –Dan, executive

“Unless you have experienced waking in the morning and groping around to put your glasses on to see what time it was, you would not understand the simple beauty of sight without corrective lenses.” –Ray, executive

“I highly recommend the procedure to my patients.” –Bill, family physician

“Safe, simple and satisfying are words to describe my experience with refractive surgery. For anyone who qualifies, it’s a definite new freedom.” –Lynn, office manager

“No more headaches from the glasses. No more bloodshot, dry eyes from the contact lenses. I consider the refractive surgery a miracle!” –Sharon, school bus driver

“The technology is amazing. The procedure was pain-free, and I could see clearly immediately after the surgery. I selected Dr. Leahey because I knew that his expertise in cornea transplants and advanced surgical skills would provide me with the best possible care.” –Gregg, attorney

“This surgery was a great decision. Nothing has done more to improve my quality of life. My advice would be to find the money and get it done. You’ll wish you had done it years ago.” –Greg, automobile dealer