LASIK, LASEK, IOL
Refractive Surgery: LASIK & LASEK
Refractive surgery is the term used to describe surgical procedures that correct common vision problems (nearsightedness, farsightedness, astigmatism and presbyopia) to reduce your dependence on prescription eyeglasses and/or contact lenses.
Main difference Between LASIK and LASEK is thickness of the flap which includes corneal stroma tissue in LASIK and only epithelial tissue in LASEK.
Phakic IOLs (Implantable Lenses)
Phakic IOLs (intraocular lenses) are an alternative to LASIK and PRK eye surgery for correcting moderate to severe myopia (nearsightedness), and in some cases produce better and more predictable vision outcomes than laser refractive surgery.
LASIK (Laser-Assisted In Situ Keratomileusis)
Laser-assisted in situ keratomileusis (LASIK) is categorized as flap surgery, where the flap is cut into the stroma directly. LASIK requires a deeper cut into the cornea than surface techniques require, and the flap opens to expose the stroma so the surgeon can shape the deep layers with an excimer laser.
Accurately correct most levels of myopia (nearsightedness), hyperopia (farsightedness), astigmatism.
Fast procedure, usually lasting only five to 10 minutes, and is generally painless
Very precise and results are very accurate (Laser-guided procedure)
20/20 vision or better is typically achieved
HOW IT WORKS
1. With Femto-LASIK, the deeper layers of the cornea are being treated.
2. The surgeon creates a flap with a femtosecond laser and lifts the flap to reach the stroma.
3. The stroma is treated using an excimer laser.
4. This treatment changes the shape of the cornea.
5. The flap is repositioned.
6. After the surgery, the cornea maintains its new shape.
LASEK (Laser-Assisted In Situ Keratomileusis)
With LASEK, the superficial layer of the cornea (the epithelium) is removed to expose the stroma. The stroma is then reshaped with an excimer laser. From a practical point of view, LASEK techniques are almost identical. As for LASEK, the epithelium is removed completely, whereas with LASEK, the epithelium is draped back over the corneal surface at the end of surgery to act as a bandage.
Safe and effective
Lasek patients report slightly better long-term results
LASEK patients report less postoperative discomfort
Less risk of infection and decreased incidence of corneal haze after LASEK
No concern over the possibility of cutting irregular flaps
Lasek have a faster recovery of nerve sensation in the cornea
Less incidence of dry eye, a common complaint
HOW IT WORKS
1. LASEK is a superficial form of laser eye surgery.
2. The epithelium is removed.
3. The cornea is reshaped using an excimer laser.
4. After the treatment, the epithelium recovers quickly.
Intraocular Lenses (IOL)
These are clear implantable lenses that are surgically placed either between the cornea and the iris (the colored portion of your eye) or just behind the iris, without removing your natural lens. Phakic lenses enable light to focus properly on the retina for clearer vision without corrective eyewear.
Implantable lenses function like contact lenses to correct nearsightedness. The difference is that phakic IOLs work from within your eye instead of sitting on the surface of your eye.
Avoid problems caused by the laser e.g. visual distortions and/or tiny refractive errors
Works better particularly in patients with high myopia
No tissue is removed from the cornea when phakic IOLs are implanted
Less risk of certain postoperative symptoms e.g. dry eye, regression
The lenses are made of a biocompatible materil - very safe
Achieve the visual acuity required to legally drive, and close to half (or more) of patients achieve 20/20 vision or better
Procedure takes 15 to 30 minutes
The lenses can be removed if necessary
Under 40s and don’t need reading glasses yet, you will be able to see at multiple distances