More than four million Americans undergo lasik surgery each year, most with excellent results.
One in 2000 Americans have an eye disease that gets worse with Lasik.
The trouble is, they do not know they have it. Now however, there is a high tech way to put you in the know.
Your eyes may look normal, but pictures from an Orb-Scan Machine can show a thin, irregular cornea.
With Lasik, which weakens the cornea, you could develop keratoconus, which cause bulging of the eye and distorted vision.
"There is some chance with Lasik that might profess faster or progress when it might not have progressed had we not done surgery," explains Dr. David Rex Hamilton of the Jules Stein Eye Institute.
The Ocular Response Analyzer measures corneal strength.
Doctors can now use it with the Orb-Scan to red flag patients wanting Lasik.