Refractive Surgery

Over the past ten years, there has been a very exciting revolution in refractive eye surgery. Today's laser vision correction gives the possibility of freedom from glasses and contacts that can affect every aspect of your daily life. You can see the alarm clock upon waking, work all day and pursue your activities without the hassle of glasses or contacts. Dr. Yohai has seen this become a reality for many of his patients.

Laser vision correction has the potential to restore natural vision and improve not only you eyesight but also your lifestyle. Laser vision correction offers clear natural vision in just minutes. This outpatient procedure can reduce or eliminate your dependency on glasses or contact lenses.


A person is considered nearsighted when their cornea is too steep or their eye is too long to allow light to focus directly on the retina. Instead, light focuses in front of the retina causing distant images to appear blurry. Refractove lens implants are typically best for farsightedness.


A person is considered farsighted when their cornea is too flat or their eye is too short to allow light to focus directly on the retina. Instead, light focuses behind the retina causing all images to appear blurry.


A person has astigmatism when their cornea is irregularly shaped (more oval than round). This causes light to bend irregularly, with more than one focus point, causing all images to appear blurry.

LASIK: Advanced Laser Vision Correction

Advanced Laser Vision Correction uses the accuracy of the excimer laser to re-contour the cornea to improve the way light is focused or "refracted" by the eye. The procedure is performed using "eye drop" anesthesia.

First, a thin layer of the cornea is lifted up as an instrument called a microkeratome gently glides across the cornea. Then ultraviolet light pulses from the excimer laser precisely reshape the internal cornea with computer-controlled accuracy. By adjusting the pattern of the laser beam, it is possible to treat nearsightedness, farsightedness and astigmatism.

After the cornea has been reshaped, the flap is replaced in its original position. Because of the cornea's extraordinary natural bonding qualities, healing is rapid and does not require stitches.

LASIK is performed as an outpatient procedure in the comfort and convenience of our excimer laser suite. Both eyes can be done at the same time and the entire procedure takes just a few minutes.

Most patients see a dramatic improvement in their vision within the first day. For some, vision may fluctuate for a short time. Most patients return to their normal activities within a day or two. Eye drops are used for one week only.

Robert A. Yohai, MD is a Board certified Ophthalmologist and specializes in the preoperative and postoperative management of refractive surgery patients. By working with Dr. Yohai or Horizon Vision Center you will be cared for by some of the most experienced surgeons in northern California.

Surface Laser Vision Correction, also known as PRK

This procedure utilizes an excimer laser to sculpt the top surface of the cornea, thereby decreasing or eliminating myopia, hyperopia and/or astigmatism. PRK enables some patients who are not candidates for LASIK to undergo laser vision correction, but PRK involves a longer, more painful recovery time than LASIK. Drops containing steroids may be prescribed for up to six months. Generally, only one eye can be done at a time.

To find out if you are a candidate for laser refractive surgery call us at (877) GR8- EYES for an evaluation.