Freevis LASIK Centers: Femto-LASIK, Epi-LASIK, Phakic IOL, Multifocal lens


On this page, we will review current developments in LASIK and vision correction surgery for you.

AAO Subspecialty Day 2013: Perfecting Vision
Michael Knorz, M.D., is one of two program directors of this years' refractive surgery subspecialty day. Featured topics are phakic lenses, corneal cross-linking, presbyopia correction and femtosecond-laser assistent lens exchange.
Nov. 15-16, 2013, Morial Convention Center / New Orleans

Journal of Refractive Surgery published series of articles on laser refractive surgery co-authored by FreeVis Founder Michael Knorz, MD
Anterior Segment OCT Imaging After Femtosecond Laser Cataract Surgery.full article
Nagy ZZ, Filkorn T, Takács AI, Kránitz K, Juhasz T, Donnenfeld E, Knorz MC, Alio JL.
Journal of Refractive Surgery, 2013 Feb;29(2):110-2.

Laser refractive cataract surgery with a femtosecond laser after penetrating keratoplasty: case report.
Nagy ZZ, Takács AI, Filkorn T, Juhász E, Sándor G, Szigeti A, Knorz MC.
Journal of Refractive Surgery, 2013 Jan;29(1):8.

Refractive surgical problem: November consultation.
Maloney RK, Malyugin B, Knorz MC, Masket S, Fram NR.
Journal of Refractive Surgery, 2012 Nov;38(11):2055-7.

Comparison of Long-term Visual Outcome and IOL Position With a Single-optic Accommodating IOL After 5.5- or 6.0-mm Femtosecond Laser Capsulotomy full article
Szigeti A, Kránitz K, Takacs A, Miháltz K, Knorz MC; Nagy ZZ
Journal of Refractive Surgery, 2012; 28(9): 609-613

Corneal changes in progressive keratoconus after cross-linking assessed by Scheimpflug camera.
Kránitz K, Kovács I, Miháltz K, Sándor GL, Knorz MC, Németh J, Nagy ZZ.
Journal of Refractive Surgery, 2012 Sep;28(9):645-9.

Comparison of IOL Power Calculation and Refractive Outcome After Laser Refractive Cataract Surgery With a Femtosecond Laser Versus Conventional Phacoemulsificationfull article
Filkorn T, Kovács I, Takács A, Horváth E, Knorz MC, Nagy ZZ

Journal of Refractive Surgery, 2012; 28(8) : 540-544

At the beginning of a new era: Laser refractive cataract surgery
Michael Knorz, M.D., is one of the speakers at this years' ESCRS Symposium "Femtosecond laser assisted cataract surgery" on October 6, 2013 in Amsterdam

Laser refractive cataract surgery is here to stay
Michael Knorz, M.D., talked about femtosecond laser-assisted cataract surgery and its future implications. Speakers at the "Controversies in Cataract Surgery Symposium" he presented at talked about its safe results.

Multifocal lenses: Secrets for Patient Satisfaction
At the 28th Congress of the Asia-Pacific Academy of Ophthalmology in Hyderabad, India, Michael Knorz, MD presented his experience: The keys to long-lasting patient satisfaction after multifocal lens implantation are 1) patient selection, b) selection of lens, c) clear optics and d) the correction of any residual refractive error.

Do we need phakic IOLs? Yes!
Phakic lenses offer an alternative for patients with higher myopia or thin corneas, when LASIK is not suitable or may cause too many side effects such as halos. Michael Knorz, MD, presented the results from his practice at the 28th APAO Congress and explained the advantages of phakic IOLs.

Laser Systems for Refractive Cataract Surgery
Michael Knorz gives an overview of current femtosecondlaser systems used for refractive lens surgery. Advantages of this revolutionary technology used for the lens exchange (cataract surgery) are a reduction in ultrasound required to fragment the lens, a better centration of the artificial intraocular lens, and the possibility to correct an corneal astigmatism.

Pioneering Laser refractive Cataract Surgery
Michael Knorz, MD is credited for the introduction of the femtosecond laser to assist in cataract surgery in Europe. Learn more...

Best of 2012: Breakthroughs in Cataract and Refractive Surgery
With the help of industry representatives and fellow ophthalmologists, the Associate Chief Medical Editor of Cataract and Refractive Surgery Today Europe uncovers this year's hottest topics and uncovers what's in store for 2013. Michael Knorz, MD, gives a physician's perspective on the LenSx Laser System used for the refractive laser lens exchange. Dr. Knorz is convinced that femtosecond laser technology has opened a new era of cataract and lens surgery and will lead to improved outcomes.

LASIK can be a life saver for US soldiers
Almost half of all US soldiers are nearsighted and therefore relaying on contacts or glasses. For them, a LASIK procedure is essentiell and can be life saving.

Welcome to the Future: Laser Refractive Cataract Surgery
At the World Ophthalmology Congress in Abu Dhabi, Michael Knorz discussed how the femtosecond laser can potentially revolutionize cataract surgery by demonstrating advantages of the new technology such as better circularity of the capsulorhexis, overlap and IOL centration. He presented his own results and gave an overview of laser systems available today.
Laser refractive cataract surgery
Laser refractive cataract surgery - Overview of laser systems
Michael C. Knorz, World Ophthalmology Congress, February 2012, Abu Dhabi

Toric Multifocal IOLs or Bioptics?
The Correction of Astigmatism in Cataract and Refractive Surgery

Multifocal IOLs are designed to replace glasses. This necessitates a perfect refractive outcome, which means emetropia. To achieve good vision at distance and near, the refractive error must be within +/- 0.5 D, both for sphere and cylinder. Michael Knorz discusses available options for the correction of corneal astigmatism: corneal incisions, corneal laser refractive surgery such as PRK/LASEK or LASIK, and toric IOLs.
Source: World Ophthalmology News. February 2012: 11 - 12
Toric Multifocal IOLs or Bioptics? The Correction of Astigmatism in Cataract and Refractive Surgery World Ophthalmology News. February 2012: 11 - 12

Advanced Technology IOLs: Recommending the right IOL
Ocular Surgery News Europe Edition assembled a panel of experts to review leading trends in advanced technology IOLs, and to provide perspectives on recommending the right IOL for patients undergoing cataract surgery. The November OSN supplement is based on a roundtable discussion held during the 2011 American Society of Cataract and Refractive Surgery Symposium and Congress. Among the panelists are Richard L. Lindstrom, MD, and Michael Knorz, MD.

FreeVis specialists honored - Again.

November 2011 - As in the previous year, FOCUS magazine lists Michael Knorz, MD, and Armin Scharrer, MD, among the TOP 39 German refractive and cataract surgeons.
Sources: FOCUS spezial 11/2011 and FOCUS 21/2010

Michael C. Knorz, M.D. presented Keynote Lecture at AAO's Refractive Surgery Subspecialty Day
October 2011 - Michael Knorz presented results that highlight advantages of using the femtosecond laser during refractive cataract surgery. "Laser fragmentation requires less phaco power and doesn't disturb endothelial cells. The laser capsulotomy provides IOL centration and refractive predictability," Dr. Knorz said in his keynote address during the Refractive Surgerys Subspecialty Day at the 2011 Annual AAO Meeting in Orlando, FL. The laser is beneficial in capsulotomy, lens fragmentation, corneal incisions, and astigmatism correction. Dr. Knorz said a recently published study has proven that IOL centration is better with the laser versus a manual capsulorhexis. Also, he said, there is a safety advantage with the laser platform. "When we compare manual and laser phacoemulsification, we see about a 50% reduction in phacoemulsification power, as well as a 28% decrease in endothelial cell loss in the femto laser versus the manual technique," he said.

ESCRS 2011: Refractive adjustments after ocular surgery: To lift or not to lift?

September 2011 - Flap lift remains the standard enhancement after LASIK, as long as the flap is normal and the stromal bed is thick enough, according to a speaker at Monday's main ESCRS symposium, "Refractive Adjustments After Ocular Surgery." "Looking at the literature and talking to my colleagues, I would say that, today, under-the-flap is the preferred technique for enhancements, both for femtosecond LASIK and microkeratome LASIK," said Michael Knorz, M.D. , Germany. "The reasons are patient comfort and it is easily repeatable. Always lift the flap rather than recut. The rate of complications is much higher if you recut." Surface ablation is preferred if the stromal bed is too thin, if the flap is abnormal, or there has been a previous RK or corneal graft, Dr. Knorz said. Aspheric or custom ablation can be used to treat refractive errors, while custom ablation should also be used to treat higher order aberrations.

Femtosecond laser assisted capsulotomy - First results

August 2011 - More precise capsulotomy sizing and centering can be achieved when using the femtosecond laser during cataract surgery / refractive lens exchange. Properly and regularly sized, shaped, and centered femtosecond laser capsulotomies resulted in better overlap parameters that help maintain proper positioning of the IOL.
Kránitz K, Takacs A, Miháltz K, Kovács I, Knorz MC, Nagy ZZ: Femtosecond laser capsulotomy and manual continuous curvilinear capsulorrhexis parameters and their effects on intraocular lens centration  —   [full article], J Refract Surg, 2011 Aug;27(8):558-63
Nagy ZZ, Kránitz K, Takacs AI, Miháltz K, Kovács I, Knorz MC: Comparison of intraocular lens decentration parameters after femtosecond and manual capsulotomies  —   [full article],J Refract Surg, 2011 Aug;27(8):564-9

Angle-supported phakic intraocular lens for correction of moderate to high myopia

Knorz et al conclude that angle-supported phakic lenses offer favorable refractive correction and predictability as well as acceptable safety in patients with moderate to high myopia. Knorz MC, Lane SS, Holland SP: Angle-supported phakic intraocular lens for correction of moderate to high myopia: Three-year interim results in international multicenter studies
J Refract Surg, 2011 Mar;37(3):469-80

FreeVis introduces the Laser-assisted Refractive Lens Exchange

July 2011. The use of the femtosecond laser during the refractive lens exchange further increases its precision and safety. FreeVis uses the precision laser for the first four steps of the procedure: First, the laser liquifies the natural lens. Next, the laser is used to cut a circular opening into the lens capsule and a small incision in the periphery of the cornea. Finally, the femtosecond laser can also be used to correct an accompanying astigmatism.

iLASIK - Advanced Technology That Delivers Personal Best Vision

The iLASIK solution is the unprecedented combination of IntraLase® technology and the Advanced CustomVue® procedure, a one-of-a-kind blend of technology that yields clinical benefits at every step.

Questions you should ask before your laser vision correction

Who should not have LASIK surgery? Can I wear contact lenses prior to the pre-op exam? What are the risks of LASIK surgery? How long will the treatment result last? For answers to these and other questions, click here.

Surgeon shares new refractive technologies adopted in clinic: iLASIK and phakic IOLs

Michael C. Knorz, MD, is routinely using iLASIK (Femto-LASIK) and phakic IOLs in his practice and shared insights about the new technologies at the joint meeting of the Asia-Pacific Academy of
Ophthalmology and the American Academy of Ophthalmology. More...

Interview with Michael Knorz, MD: The changing face of refractive surgery
The innovative practice of using a femtosecond laser to create LASIK flaps has profoundly changed laser refractive surgery. More...

LASIK World Literature Review: Quality of Life and Patient Satisfaction

95.4 % of LASIK patients worldwide report satisfaction with the outcome of their LASIK procedure, according to a meta-analysis of patient reported outcome performed by the Joint LASIK Study Task Force. Learn more: Medical News Today | Abstract of publication (Medline)

50 tough questions you should asked your LASIK doctor

A detailed guide to selecting a LASIK surgeon by USAEyes.