What you should know

Many people wanting to get rid of their contacts and glasses go to a LASIK centre, but are rejected as good candidates.  They’re told that they cannot get LASIK or IntraLase because “You’re prescription is too high”, or “You’re cornea is too thin.”  This is not really telling the patient the full truth.

What the doctor should have told them is that “the amount of tissue we have to waste cutting the flap, plus the amount of tissue we have to remove to eliminate your prescription, would leave your cornea too thin, and unsafe for LASIK or IntraLase.”

By not cutting a flap, Dr. Chynn is saving 100-150 microns of cornea tissue–which is enough to treat another 10 diopters of prescription.  This is why the safe limit for LASIK is about -10, whereas the safe limit for LASEK can be more than -20!  So that’s why Dr. Chynn has successfully and safely treated the highest prescription ever lasered in NYC (-22.00)!  It’s also why the average prescription treated at Park Avenue LASEK is about -8.00, whereas at every other LASIK centre their average is more like -4.00.  Because we are seeing–and treating–many people who were rejected at other centers!

In addition, LASEK avoids the night glare and dry eyes that are sometimes associated with LASIK.  Why is this?  Again, because LASEK avoids cutting into your eye. In fact, the primary reason that Dr. Chynn switched from performing (thousands) of LASIKs to LASEK is that he himself, has some minor (but bothersome) dry eyes and night glare after his own LASIK.

Night glare after LASIK is caused by your cornea being in 2 pieces forever, since the LASIK flap is cut, lifted up, put back down–and never fully heals.  This is why you can enhance a LASIK years later by digging the flap back up–because it never heals.  Because of this, after LASIK, light is invariably scattered and refracted by the flap interface.  Put another way, the “sandwich” configuration of your cornea is what causes back-scatter of light.  This is most noticeable at night–and causes night glare.

Because your cornea is never cut and no flap is made in LASEK, night glare is avoided.  In fact, after LASEK, many of our patients say that their night vision is actually better than it was before in glasses or contacts!

Dry eyes after LASIK is also caused by cutting the flap. When this cut is made, most of the corneal nerves are cut–and never grow back (nerves are terminally differentiated tissue, and lack the ability to regrow–which is why if you’re truly paralyzed, it’s unfortunately for life).  Your eyes are lubricated by the tear film, which is distributed when you blink. But, there is no “clock” in your brain timing blinks. Instead, you blink when you (subconsciously) sense your eye drying out. This is why you cannot keep your eyes open forever–eventually, this sensation of dryness is so powerful, you cannot avoid blinking.

But what happens when you cut most of your corneal nerves? Published studies have shown that normal people blink every 5-10 seconds–but after LASIK, they blink only every 10-15 seconds.  In fact, they’re staring themselves dry without even knowing it!

In contrast, after LASEK, because your cornea and its nerves are never cut, your blink rate afterwards is the same as a normal, unoperated eye–hence, no dry eyes!

Dr. Chynn has also eliminated all complications in the operating room by no longer cutting flaps.  That’s why we can have the only glass “open OR” in NYC! Do you think we could have people watching on the sidewalk during their lunch, invite companions into the OR, and stream our live LASEK seminars live if there was even a small chance of a major complication?  Of course not!

LASEK is newer, safer and all in all a better choice!

Compare it yourself and make your own decision!

  • LASEK vs PRK
  • LASEK vs LASIK
  • Standard vs HD Procedure

Many of our ptients have come in asking what makes our procedure different from a PRK since in both procedures the skin is removed. To put it simply, LASEK is virtually painless compared to a PRK.

There is virtually no pain or discomfort with our LASEK procedure. For patients that elect to have the older PRK surgery, there is immense pain for up to a week or more after surgery. While both procedures don’t cut flaps, in a PRK the skin is sanded it off, which uses a much more abrasive force than the gentler LASEK procedure.

Rather than using a softening solution to allow the skin to loosen, a PRK procedures opt to remove the skin right away. PRK procedures use a small sander to sand the skin off to reach the cornea. The result of this force is that patients experience intense pain and heal slower than with the LASEK procedure.

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