Technolas 217 Excimer laser

Bausch & Lomb’s Z100 is an advanced excimer laser. Its innovative “flying spot” technology produces an extremely smooth corneal surface. Unlike standard lasers, the B&L Z100 uses a state of the art feedback mechanism that makes sure every pulse is placed exactly as prescribed. The Bausch & Lomb Z100 laser is a 7th generation, flying spot laser with an eye tracker that is capable of treating the entire cornea.

What is a “flying spot” laser?

An excimer laser is an extremely precise computerized instrument that uses invisible ultra-violet light to perform corneal surgery. The cool light produces virtually no damage to the surrounding tissue, increasing its safety. Each pulse of the laser removes only a minute amount of corneal tissue – about 1/500th of the thickness of a human hair.


Larger Treatment Zone

Many lasers only treat an area of 6-8mm with narrow smoothing of the edges. This can result in night vision difficulties when the patient is under low light conditions, as the pupil can grow/dilate up to twice its normal size to accomodate for the lack of light. Thus, the pupil can enlarge beyond the treatment zone resulting in glare and a “halo” effect.

The Bausch & Lomb laser eliminates this problem by offering the widest treatment zone available for treatment. In addition, the laser creates a blend zone that allows the doctor to smooth the corrected area into the rest of the cornea, maintaining a spherical shape.

FDA Clinical Trial Results

*U.S. FDA clinical studies results show that, following LASIK surgery using the Bausch & Lomb Z100 laser, 99.7% of patients see 20/40 or better without glasses or contacts. 20/40 is the legal requirement for being able to drive without correction. Results also concluded that 87.3% of patients see 20/20 or better without glasses or contacts and that over 90% of patients treated do not experience any night vision disturbances.

Alcon WaveLight Allegretto EX500

The Alcon WaveLight Allegretto EX500 was the first excimer laser used to perform wavefront-guided treatments. Wavefront technology measures aspects of the eyes’ refractive error that cannot be detected with traditional scans. In addition to this innovative feature, the Alcon WaveLight Allegretto offers a number of unique optical measurement instruments:

  • Eye Tracker: A 500Hz eye tracker reacts to the eye’s movements with just 2 milliseconds of latency so the excimer laser can be properly positioned for an increase in speed of over 1.4 seconds per diopter.
  • Beam Size: A small beam that is 0.68 mm in diameter with a Gaussian profile for smoother ablation.
  • Speed: This system applies 200 individual laser pulses per second to help prevent adverse effects.
  • Optical Zones: The combination of optical zones from 1.5 mm to 8 mm allows the surgeon to perform the treatment, helping to reduce night vision problems in patients.

These features, along with the laser’s ability to treat a larger area of the cornea, allow our surgeons to create a more natural corneal shape. Use of the Alcon WaveLight Allegretto results in a higher quality of vision, particularly under low luminance conditions and reduces or eliminates glare and halos when driving at night.