What is Laser Eye Surgery?

Laser Eye SurgeryLaser eye surgery is a painless, safe, effective and affordable treatment that eliminates the need for, or reduces one's dependence on, glasses or contact lenses.

Laser eye surgery is the most commonly practiced procedure to correct vision problems caused by refractive errors, including myopia (near-sightedness), hyperopia (far-sightedness) and astigmatism (distorted vision when looking at objects at any distance). More recently, laser eye surgery has also been used to correct presbyopia (the inability to focus on nearby objects), which is part of normal aging and can be corrected by using reading glasses.

Horizon Laser Vision Center is a laser eye surgery clinic performing laser eye surgery procedures; iLASIK, custom PRK, iLASIK Xtra, PRK Xtra and KAMRA VisionTM , in Regina and Saskatoon. Horizon offers Saskatchewan the latest technology available; the iLASIK Technology Suite from AMO (Abbott Medical Optics), a combination of VISX Star 4 IR Excimer Laser, iFS Advanced Femtosecond Laser (IntraLase) and iDesign CustomVue wavefront technologies – delivering the most advanced and accurate laser vision correction for our patients, and the highest level of safety and improved visual outcomes.

Our Laser Eye Surgery Technology

Laser SurgeryExcimer lasers are cool concentrated beams of ultraviolet light that safely, painlessly evaporate microscopic layers of the cornea leaving the underlying tissue virtually untouched.

The AMO VISX STAR S4 platform is categorized as a variable spot scanning excimer laser with a beam that varies in size from 0.65 mm up to 6.5 mm over the treatment area, and blending out to 8.0 mm. The variable size of the beam allows for shorter treatment times and more conservation of tissue. The VISX STAR S4 also boasts a variable repetition rate to allow for optimization of treatment times.

The VISX Star S4 has an active eye tracking system, known as the ActiveTrak 3-D Active Eye Tracking System. This eye tracking system captures all 3 dimensions of intra-operative eye movements. The VISX Star S4 also utilizes ActiveTrak Automatic Centering. This capability locates and then automatically sets the treatment center to the center of the pupil.

Iris Registration (IR) is also an important ingredient on the VISX Star 4. There are many measurements of the optics of the eye that are particularly sensitive to orientation of the eye during surgery. Astigmatism, and higher order aberrations require an accurate alignment with the original measurements taken in order to provide an accurate treatment. The eye is known to slightly rotate once the patient has changed from a vertical sitting position (where the measurements were taken) to a horizontal position (where the surgery is performed). The VISX Star S4 is the first Iris registration system available and the first FDA approved fully automated, non-contact method of alignment of the correct CustomVue treatment to the corneal site. This is extremely important as it provides a solid means of providing the most accurate treatment available.

The VISX Star S4 CustomVue procedure tailors a distinct correction for each individual; in fact each treatment is designed by the unique characteristics of the individual eyes. iDesign technology captures unique imperfections in each individual’s vision that could not have been measured before. The iDesign uses light wave technology to identify and measure imperfections in an individual's eye many times more accurately than standard methods used for glasses and contact lenses. iDesign technology produces a detailed map of the eye much like a fingerprint; no two are alike and translates this information into a set of CustomVue treatment instructions for the laser. iDesign transfers these digital treatment instructions to the laser, providing a new level of precision and accuracy.

Traditionally for the creation of LASIK flaps, doctors have used an instrument called a microkeratome – a hand-held blade that moves across the eye. Regular Lasik is very safe, but if complications do occur, the microkeratome is frequently the cause. The AMO iFS IntraLaseTM Femtosecond 100% blade-free flap creation technology removes this possible source of complication. By eliminating the blade commonly used for corneal flap creation with a femtosecond laser, LASIK eye surgery is safer than ever before. The IntraLase™ iFS Laser System delivers more accurate and consistent flap thickness — which is critical for a successful LASIK outcome. Maintaining the integrity of the corneal biomechanics is a critical element in the success of the refractive procedure — and only IntraLase delivers unmatched control over flap diameter, depth, and centration, resulting in superior visual outcomes. With this 5th generation femtosecond laser, tiny pulses of laser light, a quadrillionth of a second each, pass harmlessly through the outer portion of your cornea and form a uniform layer of microscopic bubbles just beneath the surface of your eye. This corneal flap is customized to your unique eye shape. Flap creation takes only about 12 seconds. Patients may experience fewer LASIK flap-related complications and fewer induced higher order aberrations that contribute to visual disturbances, such as glare and halos. It’s the most advanced treatment available and millions of procedures have been performed safely and effectively.

Horizon Laser Vision Center uses the IntraLase for iLASIK and for KAMRA VisionTM. The Star S4 IRTM Excimer Laser System, CustomVue, is used for both iLASIK and custom PRK. These represent the latest technologies currently available, which translates into greater accuracy of treatments, safety and improved visual outcomes.


Visit AMO to learn more about this technology.