About Laser Vision Correction
Laser Vision Correction (LVC) is the term used to describe the surgical procedure by which an excimer laser is used to reshape the cornea, reducing or eliminating the requirement for or dependence on glasses or contact lenses for clear vision.
Re-shaping of the cornea is achieved by removing minute amounts of corneal tissue.
Procedures now exist for nearly all forms of refractive errors (the optical term for a requirement for glasses or contact lenses). When correcting Myopia (short-sightedness) the curvature of the cornea is decreased, or made flatter. When correcting Hyperopia (long-sightedness) the curvature of the cornea is increased to make it steeper. When correcting Astigmatism the curvature of the cornea equalised in all directions.
Hyperopia - long-sightedness
Myopia - short-sightedness
Customised Trans-Epithelial No-touch (cTEN) laser technique
This technique involves the surgeon removing the outermost layer of the cornea (the epithelium) in the area where the underlying cornea is to be treated. The excimer laser is then applied to the cornea to ‘shave’ a minute amount of tissue from the surface.
The technology at AAEC allows an advanced form of PRK called Transepithelial PRK (T-PRK) to be used. The laser itself removes the epithelium before proceeding to alter the corneal shape. Once the instrument to prevent blinking is in place this is the customised, Trans-Epithelial No-touch (cTEN) laser technique, available only at Ashford Advanced Eye Care. Usually, the entire laser treatment lasts for around a minute.
The entire procedure is carried under anesthesia drops placed onto the eye immediately before the procedure. After the procedure, the healing process commences immediately, and the epithelium begins to regenerate, healing over about four days. Most patients find that they are able to achieve useful vision within a week to 10 days after this type of laser eye surgery.
Laser Assisted In-situ Keratomileusis (LASIK)
Laser Assisted In-situ Keratomileusis (LASIK) is a laser vision correction technique for correction of greater degrees of short and long-sightedness. Using a motorised device called a micro-keratome, an extremely thin flap is created from the cornea. The micro-keratome itself is used as the precision and thickness of the flap that is being created is impossible to achieve by hand. The flap is then folded back, and the excimer laser applied to the underlying corneal tissue. The flap is then returned to its original position over the top of the newly treated cornea. No stitches are required to hold the flap in place as flap adheres back into place within 2-3 minutes. Most patients find that they are able to achieve useful vision 1-2 days after this type of laser eye surgery.
For more information on Laser Eye Surgery: