The surface-ablation family
All surface procedures apply the excimer laser to the front of the cornea after dealing with the epithelium. They differ only in what happens to that epithelium:
- PRK: the epithelium is removed (mechanically, with alcohol, or with the laser itself) and discarded. It regrows over three to five days.
- LASEK: dilute alcohol loosens the epithelium, which is folded back as a sheet, the laser is applied, and the sheet is replaced. The idea was faster healing and less pain.
- Epi-LASIK: a blunt separator lifts the epithelial sheet mechanically without alcohol, then it is repositioned or discarded.
None of these involve a stromal flap, so none carry LASIK's flap complications. All leave the front cornea structurally intact, which is why they are preferred for thin corneas and contact-sport athletes.
Did the epithelial flap help?
Mostly no. Studies through the 2010s found that a replaced epithelial sheet often did not survive and was shed anyway, so pain and healing time ended up similar to PRK, and in some series slightly worse. As a result many surgeons went back to plain PRK, often with the laser doing the epithelial removal (transepithelial or 'trans-PRK'), which is fast, no-touch, and well suited to modern platforms. In Colombia you will find all three names in use; in practice most clinics offering LASEK today are doing a form of PRK.
What you should actually ask
- Is the epithelium removed by alcohol, brush, or laser (transepithelial)?
- Is mitomycin C used for my correction level? (See corneal haze.)
- What is the expected pain window, and what pain management is given? Most clinics use a bandage contact lens, topical NSAID drops for a day or two, and oral analgesics.
- How many days before the bandage lens comes out, and will that happen before I fly?
Who should choose a surface procedure in 2026
| Situation | Why surface ablation |
|---|---|
| Thin cornea or borderline tomography | No flap tissue consumed; more residual bed |
| Contact sports, military, police | No flap to dislodge |
| Dry eye that is manageable but not severe | Fewer corneal nerves cut than LASIK |
| Previous RK or irregular surface | Safer than cutting a flap across scars |
| Small residual after previous LASIK | PRK over the flap avoids re-lifting |
If you need fast visual recovery, are a nervous patient about several days of discomfort, or have a very high prescription, LASIK, SMILE or ICL are usually better matched. See the three-way comparison.
Trip planning for surface ablation
Plan six to seven nights: surgery, bandage lens removal at day four or five, and a check before flying. Vision is functional but soft for one to three weeks and sharpens over one to three months. Bring the good sunglasses.
Frequently asked questions
Is LASEK better than PRK?
Not meaningfully. Most comparisons show similar pain, healing and outcomes, and many surgeons have returned to PRK or trans-PRK.
Is Epi-LASIK the same as LASIK?
No. Despite the name it is a surface procedure without a stromal flap, closer to PRK than to LASIK.
Which surface procedure hurts least?
Trans-PRK with a bandage lens and modern pain protocols is comparable to the others; the difference is small and technique-dependent.
Not sure which laser procedure fits?
Send your corneal thickness and prescription. We will tell you which Colombian clinics would evaluate you for surface ablation vs LASIK vs SMILE.
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