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Our Technology

Allegretto Technology

PerfectPulse Technology™represents a new approach to laser vision correction – it accounts for speed, precision, and safety in the ALLEGRETTO WAVE laser and offers improvements that are revolutionary in the field. Smart energy control measures and adjusts energy levels in the laser pulse from creation to delivery. High-speed eye tracking charts the eye’s movement 200 times per second. As a result, every laser pulse is completely controlled and accurate, achieving the most accurate level of correction possible.

You can have peace of mind that the amount of energy in the laser has been calibrated to exactly the right level. After the beam has been created, it passes through three checkpoints on its way to your eye. At each of these points, the energy level is checked and adjusted if necessary, ensuring that the beam is perfectly attuned at its destination.

ALLEGRETTO WAVE’s laser is essentially a precise, controlled beam of energy. The laser employs a proprietary overlapping method to ensure accurate laser placement, and is one of the ways that ALLEGRETTO WAVE achieves a rounder, more natural corneal surface than many other lasers used for vision correction.

Due to the remarkable speed of both the eye and the ALLEGRETTO WAVE procedure, the laser beam needs to be constantly and minutely adjusted to the position of the eye at any given time. Every 4-6 milliseconds, the eye’s location is measured and the internal mirrors of the ALLEGRETTO WAVE are automatically aligned. Right before the pulse is released, a second check is made to confirm that the eye has not moved. This happens 200 times every second, once for every laser pulse. If, at any time, the eye moves too quickly to be measured or moves out of range, the laser will stop and wait for the eye to move back into position.

Currently, the ALLEGRETTO WAVE is the fastest vision correction laser for LASIK available in the United States. At 200 laser bursts per second, it only takes about four seconds of treatment to correct one diopter. Of course, spending less time under the laser means less stress and discomfort for the patient.

Wavelight EX500 Excimer Laser

Precision Laser Group is proud to announce their newest addition to laser eye correction surgery! Introducing the Wavelight EX500 Excimer Laser by Alcon; the most advanced and quickest excimer laser available in the United States. Alcon has built this new technology to deliver accurate refractive laser treatments, making the Wavelight EX500 today’s leading laser in the industry. At PLG, we are pleased to offer our patients this top notch technology along with its following benefits:

  • Precision- Designed to deliver fast ablation times with superb outcomes, this modernized technology helps to reduce the possible risks of flap shrinkage, eye movement sensitivity, fixation fatigue, and stromal dehydration of the cornea.
  • Treatment Options- The laser is customized for each unique eye, fixating on pupil centration and corneal centration. The Wavelight EX500 contains a powerful multi-dimensional eye tracker which assists in the accuracy of the incisions and corneal flap. This option allows for different treatment variations depending on the uniqueness of each patient’s eye.
  • Sharper Vision- With an optimized shot distribution, the laser sustains a high pulse frequency which reduces halos and glare. This technique allows for clearer vision during night time driving and sunny days.

At Precision Laser Group, we strive to provide our patients with safe and effective procedures. The Wavelight EX500 helps us to deliver the best outcomes of your surgery coupled with safe and the latest technology. Call us today to schedule an appointment with one of our highly trained and recommended eye physicians.

Allegretto Wavefront (Brochure)

One of the most innovative features of the ALLEGRETTO WAVE is the way it uses wavefront-optimized technology to automatically compensate for the curvature of the cornea. In earlier laser correction systems, the “optical zone” or area of correction, was centered on the front of the cornea; the result was a flattened circular area that ended with an abrupt edge, causing unwanted side effects like poor night vision, glare, and halos.

ALLEGRETTO WAVE changes all that. The ALLEGRETTO WAVE sends extra pulses to the peripheral cornea area in order to compensate for the angle of the laser beam. In this manner, the aspherical shape of the cornea is preserved to a degree that older lasers simply could not achieve. This compensation, combined with the incredibly small, 1mm size of the laser, produces a smooth, effective optical zone that results in what can only be described as high performance vision.

Imagine a glass ball. If you took a flashlight and aimed it directly at the top of the ball, the light would form a circular shape on the surface of the ball. If you now aimed the flashlight towards the side of the ball, the light would form an elliptical shape and not seem as bright anymore. This is because the same amount of light is suddenly distributed over a larger area and some of the light is reflected away due to the angled surface of the glass ball.

In addition, the Allegretto Wave is the fastest laser system available in the U.S. today, and allows the surgeon to finely sculpt the patient’s new vision with precise accuracy. This laser also features an ultra-fast eye-tracking system to follow eye movement during the procedure.

This high-speed tracker is a key component of the system’s unique PerfectPulse Technology, developed to accurately control the energy level and exact placement of every laser pulse. Understanding that all eyes are not the same, the Allegretto Wave takes into consideration each patient’s individual corneal steepness and automatically compensates for laser energy that can be lost in the periphery of the cornea due to the eye’s natural shape. By doing so, the Allegretto Wave specifically addresses spherical aberrations that can potentially cause glare and may distort night vision.

More about the Allegretto Wave:

  • In FDA trials, 93 percent of all patients saw as well or better without glasses after treatment than they did with glasses prior to treatment
  • More than 50 percent achieved 20/16 vision or better
  • Fewer than 5 percent needed an enhancement later
  • The Allegretto Wave was granted clearance for the widest approval range ever initially granted to a new laser system

If you would like to know more about options for LASIK in Connecticut or more specifically about our surgeons doing LASIK in Waterbur, please fill out our contact form and our certified LASIK surgeon will be happy to answer any questions.


The Medical Directors/Surgeons of Precision LASIK Group [PLG] understand the importance of clear vision and that no two patients are exactly alike. With this in mind, PLG surgeons are very particular about choosing appropriate candidates and about customizing each patient’s procedure to fit their specific visual and surgical needs.

During a patient’s screening process, PLG surgeons determine not only if the individual is 100% appropriate for Laser Vision Correction, but also which refractive surgery procedure –LASIK [laser-assisted-insitu-keratamileusis] or PRK Eye Surgery [photo refractive keratectomy] is best suited for them. The finest candidates will obtain the finest results.

Some of the deciding factors between choosing LASIK surgery or PRK surgery may include corneal thickness or whether a patient prefers a less invasive procedure or one which offers speedier recovery. Both procedures involve the same laser application to reshape the cornea, however the initial portions of the procedure dealing with flap creation versus removal of epithelium [corneal ‘skin’] differ. Both LASIK and PRK have been proven to offer the same fantastic, life-changing results with virtually no discomfort during the procedure.

Before deciding on Laser Vision Correction you should discuss the benefits of each procedure with your doctor. A thorough eye exam will be conducted before any decision can be made. Once the exam is completed the doctor will go over the results and determine what will be the best decision for your eyes.

Laser Photorefractive Keratectomy (PRK Eye Surgery)

PRK Eye Surgery (Photorefractive Keratectomy) was one of the first refractive surgeries to use a laser to correct a patient’s eyesight. The PRK was thoroughly tested before it was extensively performed on patients after receiving approval from the FDA. PRK is available to some patients who are not strong candidate for LASIK.

During PRK an excimer laser is used to change and/or alter the shape of a patients cornea. By changing or altering the shape of the cornea, rays of light will be able to better reach the retina. The laser uses cold light beams to remove cell tissues from the top of the cornea. The process of removing the cells is called ablation and the amount of ablation needed is determine by the type of refractive error being corrected.

The healing process for PRK eye surgery takes longer than LASIK surgery because the procedure is done entirely on the surface of the cornea. Typically, protective contact lenses are worn after surgery to protect the cornea during the healing time. PRK is a procedure that can help improve vision for candidates who are not strong candidates for other laser vision correction procedures.

Precision LASIK Group

700 West Johnson Ave.
Suite 101
Cheshire, CT 06410