Laser Technology

LASIK and PRK Laser Vision Correction Procedures

We are pleased that you are interested in the laser vision correction procedures available to correct nearsightedness, farsightedness, astigmatism, and reading vision.

Follow the link for more in-depth information on LASIK. On the Cornea and Laser Eye Institute – Hersh Vision Group website, we hope to give you a thorough background of knowledge of the various techniques that are designed to decrease your dependency on glasses and contact lenses.

Over the years, the improvements in laser vision correction have made these procedures even more accurate and safe.  Remember, though, this is just a background to the things we do to improve your visual function.

During your actual visits with us, our doctors and staff will discuss the details of the various procedures, fully review the risks and benefits, discuss alternatives, and answer all of your questions.

The excimer laser is the primary technology for LASIK and PRK treatments of refractive errors or optical problems of the eye, including nearsightedness, farsightedness, and astigmatism.

It has advanced over the past 25 years to bring us the state-of-the-art surgical procedures which we have today.

In fact, CLEI and Dr. Peter Hersh played an important part in the original clinical studies of the laser for the correction of nearsightedness. Dr. Hersh, director of CLEI was the lead author of the clinical study that led to the first FDA approval of the excimer laser in the United States.

LASIK Technology

LASIK Surgery Example Excimer laser techniques may be used to reshape the cornea and correct refractive problems in a finely-controlled fashion by removing an ultrathin “tissue contact lens” from the surface of the eye.

The excimer laser can be used in either the LASIK or PRK/LASEK techniques. No matter the method used to prepare the eye, the laser treatment and effect are essentially the same.

Under computer control, the excimer laser critically reshapes microscopic areas of the corneal surface. Layers of tissue thinner than a human hair may be removed.

There are two general types of excimer lasers. Here at the Cornea and Laser Eye Institute, we prefer the small spot scanning, or flying spot,  Wavelight laser.

Under computer control, the laser reshapes the cornea by application of thousands of small spots, each less than 1 mm in diameter.  The actual laser application takes less than a minute.

The risks and benefits of the excimer laser procedure are discussed in more detail in the informed consent form and will be carefully discussed with you by Dr. Hersh, Dr. Greenstein, and our staff.

The Cornea and Laser Eye Institute – Hersh Vision Institute has one of the longest and most extensive experiences with the excimer laser LASIK and PRK in the country, now 25 years. Please feel free to ask us for more information to determine what is best for your specific needs.

In-Depth Laser Vision Correction Articles and Studies by Dr. Hersh

Introduction to the Excimer Laser
Results of FDA Trial of Laser Correction of Nearsightedness
LASIK Re-treatments
Excimer Laser Phototherapeutic Keratectomy


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Thank you so much Doc! When I first came to you I was 20/50 now I'm 20/10. I'm ready to have a great year!

Randy Foye
Pro Athlete, Utah Jazz #8
Female Boxer

My experience at The Cornea and Laser Eye Institute has been amazing. All of the staff have been helpful and courteous...

Phd Student, MMA fighter
Man with Doctor

Dr. Hersh and his staff were excellent. I was comfortable from the time I walked in until the time I left after the procedure.

Luke Petitgout
Pro Athlete, New York Giants Football