SURFACE LASER (LASEK & PRK)
THE OLDEST FORM OF LASER EYE SURGERY
What is surface laser eye surgery?
Surface laser is the variety of procedures that work directly on the outer surface of the cornea. PRK is the acronym for Photo Refractive Keratectomy, the precursor to LASIK eye surgery. Like LASIK eye surgery, PRK uses an Excimer laser to reshape the cornea. However, PRK works directly on the outer surface of the cornea.
Another name for a similar procedure is LASEK and epi-LASIK
Surface laser is safe and effective but has a very slow recovery and may leave patients with a tendency to recurrent erosion (pain in their eyes on waking in the morning)
At Custom Vision Clinic we now rarely perform surface laser eye surgery, because newer procedures offer similar benefits (like being able to treat those with thinner corneas or those who engage in contact sports and work). Keyhole laser eye surgery, where the laser reshapes the cornea without the need to make a flap, is called ReLEx SMILE ™.
This procedure has all the great benefits of LASIK (fast visual improvement and short recovery time) with the associated benefits of not cutting a flap in the cornea (no flap complications, less dry eye, improved comfort during the operation) and none of the downsides of surface laser eye surgery (more discomfort and shorter recovery time).
What surface laser treats
Who is suitable for surface laser eye surgery?
Ideal candidates for surface laser eye surgery include those patients who – for various reasons – are not suitable for LASIK.
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How does surface laser treatment work?
The vision correction treatment begins with anesthetic drops applied to numb your eye and prevent pain during the procedure. A lid speculum is placed in the eye to hold the lids apart for the procedure, eliminating possibility of blinking.
The surgeon will then gently remove the surface corneal cells (epithelium) and proceed with the laser aspect of the procedure. The laser is computer driven for accuracy and precision and it is programmed based on the patient’s refractive error such as nearsightedness, farsightedness, or astigmatism.
The eye correction surgery takes less than one minute for most patients. After the procedure a soft bandage contact lens is placed on the eye for three to five days until the epithelial layer regenerates.
Advantages and disadvantages of surface laser eye surgery
Advantages of surface laser eye surgery over other procedures
- Uses less tissue*
- Allows patients who are non-candidates with LASIK to have a laser refractive treatment
- No flap created so no chance of a flap complication. Less than 1% chance of enhancement required*
- The patient can resume all physical activities within 2 weeks*
*This is no longer an advantage when compared to ReLEx SMILE ™ laser eye surgery
Disadvantages to LASIK
- Healing takes longer than LASIK (driving vision in 4 to 14 days)
- Slight risk of haze (little risk with modern laser and adjunctive chemical therapy)
- Delayed epithelial healing