McMann Eye Institute

Hawaii's Premier LASIK Surgery Practice

LASIK Eye Tracking and Astigmatism

LASIK Eye Tracking Makes Astigmatism Correction Available in Hawaii

More than one-in-three people in the US has astigmatism, and many have been told they are not candidates for LASIK because they have astigmatism. McMann Eye Institute has been named a “Specialized Astigmatism Center” by Technolas Perfect Vision, providing the first comprehensive LASIK treatment of Astigmatism approved by the FDA. The McMann Eye Institute is the first practice in Hawaii to offer Advanced Control Eyetracking (ACE) on its Technolas LASIK platform.

Eyetracking allows lasers used during LASIK surgery to compensate for eye movements during the procedure, thus adding an important level of assurance. However, no eyetracker has been able to adjust for subtle rotations of the eye that occur during the laser treatment – that is until now. Since subtle eye movements are common during the LASIK treatment this unique tracking technology ensures that the intended treatment precisely matches the eye’s prescription. This is especially important for patients who have astigmatism in addition to their nearsightedness or farsightedness, which represents the majority of contact lens and eyeglass wearers in the U.S.

“Many patients with astigmatism believe that they are not suitable candidates for laser vision correction. With the advent of ACE this is no longer true. We finally have a laser vision correction procedure that is ideally suited for the treatment of astigmatism,” said Dr. McMann, Chief Surgeon and Medical Director of McMann Eye Institute. “This technology is one of a kind.  Rotation of the eye during LASIK could result in less than full correction of astigmatism, which is very common among LASIK patients, and an increased chance of the need for a secondary enhancement procedure.”

“We have always been committed to bringing the latest technology available to Hawaii. Our LASIK practice has grown because we have been able to provide the best treatments for all of our patients with all prescriptions. This has enabled us to set ourselves apart from our competitors,” says Dr. McMann.

Review of Laser Vision Correction Technology Available Today

No other LASIK system available in the US can compensate for eye rotation during the LASIK treatment. Both the Technolas ACE and VISX S4 IR (AMO) trackers compensate for the cyclorotation of the eye that can occur between the sitting position during critical diagnostic measurements and lying down on the LASIK bed.   However, only the Technolas ACE tracker can adjust the delivery of laser pulses in response to eye rotation during the LASIK treatment. Furthermore, the Technolas ACE system is enabled for both conventional and custom wavefront-guided LASIK treatments, while the VISX S4 IR tracker cannot adjust for cyclotorsion associated with conventional LASIK treatments. The eyetrackers of the Wavelight and Ladarvision lasers (Alcon Laboratories) cannot compensate for eye rotation at all.

This new eyetracker also doubles the speed of tracking so as to allow the laser to rapidly adjust to the eye’s movements; response time with ACE is now under 7 milliseconds, or 0.007 seconds. ACE also adjusts for the pupil center shifting that can occur between light and dark settings, critical to the proper centering of customized LASIK treatments over the pupil.

About the McMann Eye Institute

 The McMann Eye Institute is a Hawaii ophthalmic surgery practice founded in 2007 by Dr. Michael A. McMann. Dr. McMann, the founder and Medical Director of the McMann Eye Institute.  He has extensive training and experience in performing laser vision correction (LASIK, PRK) and advanced techniques for cataract surgery, corneal transplantation surgery, and management of corneal and external eye disease.  For more information visit the company’s website at

About Technolas Perfect Vision

 Technolas Perfect Vision is a joint venture between Bausch & Lomb, the global eye health company, and 20/10 Perfect Vision AG, the femtosecond laser developer, that is focused on the laser vision correction industry. The new company combines the refractive eye surgery assets of both businesses, and will utilize its global service and support infrastructure to introduce new, laser-based vision correction procedures, especially focusing on treatments for presbyopia. FDA approval of its ACE eyetracker in May comes on the heels of receiving CE Mark in April to commercialize the company’s INTRACOR procedure in Europe and elsewhere. INTRACOR represents a new femtosecond laser treatment for hyperopic (farsighted) presbyopes. Technolas Perfect Vision now markets product brands such as the INTRACOR femtosecond laser workstation with the CUSTOMFLAP, CUSTOMSHAPE and INTRACOR procedures, the TECHNOLAS 217z100 excimer laser system, which includes the ZYWAVE and ORBSCAN diagnostic devices, and the ZYOPTIX brand of laser vision correction treatments, as well as the HANSATOME and ZYOPTIX XP microkeratomes. For more information visit the company’s website at

1. Neuhann IM, Lege BAM, Bauer M, et. al: Static and Dynamic Rotational Eye Tracking During LASIK Treatment of Myopic

Astigmatism With the Zyoptix Laser Platform and Advanced Control Eye Tracker. J Refract Surg, 2009; in press.

2. Chang J: Cyclotorsion during laser in situ keratomileusis. J Cataract Refract Surg 2008; 34:1720–1726.

3. Ghosh S, Couper TA, Lamoureux E, et. al.: Evaluation of iris recognition system for wavefront-guided laser in situ keratomileusis

for myopic astigmatism. J Cataract Refract Surg 2008; 34:215–221.

4. Randleman JB, White AJ, Lynn M, et. al.: Incidence, Outcomes, and Risk Factors for Retreatment After Wavefront-optimized

Ablations with PRK and LASIK. J Refract Surg. 2009; 25:273-276.


News Media Contacts:

Name: Jason Sealey

Contact: +1-808-677-2733


Name: Bob Anello

Contact: +1-949-297-3531

Editor’s Note: Technolas, the Technolas Perfect Vision logo, ACE, CUSTOMFLAP, CUSTOMSHAPE, HANSATOME,

INTRACOR, ORBSCAN, ZYOPTIX, and ZYWAVE are trademarks or registered trademarks of Technolas

Perfect Vision GmbH, Munich, Germany. Other trademarks are trademarks of the respective owners.


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