ASA (Advanced Surface Ablation) – a new breakthrough in laser vision correction
Surface ablation treatments such as ASA and PRK can be considered in patients whose cornea thickness prevents them from having LASIK. ASA is similar to PRK. Similarly, the surgeon removes some superficial corneal cells prior to treatment. In ASA, a wave scan has been taken for your eyes prior to the procedure. This report contains information about all the minute imperfections of your eye. The laser is able to treat these imperfections by providing a wavefront-guided treatment.
After the treatment, a contact lens is placed over the eye. This allows the top layers of the cells to regenerate. After a few days, the contact lens is removed. As the cornea continues to heal over the next few weeks, the patient’s vision experience gets better and better. Vision can stabilize in many cases in about 4 to 6 weeks.
PRK (Photorefractive Keratotomy) – a proven alternative to LASIK
Some patients may not be ideal candidates to have LASIK vision correction. In such cases, PRK (Photorefractive Keratotomy) is an alternative form of laser vision correction that can be considered. Instead of creating a corneal flap, the topmost layer of the corneal cells are gently removed. A precision laser is applied to the cornea to correct its shape. After a few days of wearing a protective contact lens, new cells will have regenerated on the corneal surface allowing the patient to see better than before.
During the initial days, patients experience fluctuations of vision. But as days go by, the vision gets clearer. After several weeks, patients have their sharpest vision ever.