EBK Standard
A procedure combining the advantages of PRK and epi-LASIK. Gentle removal of the corneal epithelium with precise laser reshaping of the surface.
What is EBK Standard and what does it involve?
EBK (Epi-Bowman's Keratectomy) This is a superficial laser vision correction procedure, used when the structure of the eye does not allow for the safe use of deeper procedures. It combines the precision of an excimer laser with gentle removal of the epithelium and preservation of the Bowman's layerwhich promotes stable healing. A therapeutic contact lens is worn for a few days after the procedure.
Who is the EBK procedure for?
EBK is recommended for patients who, for anatomical or medical reasons are better suited to a surface procedure. It is the method of first choice for patients:
- with thin corneas , or where deeper methods cannot be safely performed,
- with deep eye sockets, narrow eyelid gaps or atypical corneas,
- at risk of eye injury - those involved in contact sports or working in uniformed services.
Using the EBK method, we correct*:
- myopia ranging from -0.25 to -6.0 D
- mild hyperopia (in certain cases)
- astigmatism up to 1.0 D
*Indicative range only. The consultation and method choice are determined by your doctor after examination. The final range is based on corneal thickness and geometry, pupil diameter, tear film quality, topography/tomography findings and fundus examination.
Advantages of EBK
Smoother epithelial regeneration
due to preservation of the Bowman's layer
Faster corneal surface healing
compared to the PRK
Minimal discomfort
usually limited to one day after the procedure
See how the procedure works
The procedure involves two main steps - first, the corneal epithelium is gently removed and then the excimer laser reshapes the cornea, correcting the refractive error.
Step 1: Preparation
The eye is numbed with anaesthetic drops. You lie down under the laser. A gentle eyelid speculum keeps your eye open throughout the procedure.
Step 2: Epithelium removal
The corneal epithelium is removed with a precise disposable instrument that gently prepares the corneal surface. Importantly, we preserve the Bowman's layer — this is what distinguishes EBK from classic PRK.
Step 3: Laser reshaping
The excimer laser precisely reshapes the exposed corneal tissue to correct the refractive error, based on your pre-operative measurements. This takes 20–60 seconds, depending on the degree of refractive error. The eye-tracking system monitors every eye movement, ensuring precise correction. You will hear the gentle clicking of the laser.
Step 4: Protective contact lens
A soft therapeutic lens (bandage lens) is placed on the eye to protect the exposed surface while the epithelium heals. The lens remains on the eye for 3-5 days. You will not feel it.
Recovery after EBK
Day of procedure
A protective lens has been fitted. You may experience pain or a stinging sensation, watery eyes and sensitivity to light for 1–3 days. Get plenty of rest, do not drive, and apply cool compresses as advised.
First follow-up visit
The corneal epithelium heals faster than with PRK, due to the preserved Bowman's layer. Discomfort decreases and vision, though still hazy, improves day by day. Your doctor assesses healing and usually removes the therapeutic contact lens at this visit. Use your eye drops regularly — hydration is particularly important at this stage.
One-month follow-up
The epithelium should be fully healed by now. Vision is much improved — most patients can return to work. Continue to avoid eye make-up, swimming pools, saunas and intense exercise. You can read, use a computer and drive, provided your vision is sufficient.
Further follow-ups
Your vision should be stable and sharp. You can return to all activities, including high-intensity sport, swimming and contact sports. Full stabilisation should occur within 6 months.
Limitations and possible symptoms
Which rules out the procedure:
- Abnormal topography/risk of ectasia; very thin cornea.
- Active inflammation, severe dryness, difficult epithelial healing.
- Pregnancy/breastfeeding; uncompensated diabetes, active autoimmune diseases.
- A tendency to scarring (higher risk of corneal haze).
What you may experience afterwards:
- Discomfort and light sensitivity (photophobia) for 1–3 days; hazy vision.
- Slower improvement in visual acuity (days to weeks).
- Dry eye, transient corneal haze.
- Rare: infection
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FAQ
We will answer all your questions
Why is EBK sometimes preferred over PRK or FemtoLASIK?
The EBK is preferred when deeper methods (FemtoLASIK, SMILE) are not the most suitable option due to the structure of the eye, and where smoother healing than with classic PRK is desired.
Preservation of the Bowman's layer promotes corneal stability and usually shortens and eases the regeneration process.
EBK and PRK - what are the differences?
EBK preserves the Bowman's layer, resulting in better biomechanical stability of the cornea. Healing is faster (2–3 days compared to 3–5 days with PRK), with less post-operative discomfort and a reduced risk of corneal haze. Visual outcomes are comparable, but the recovery process is more comfortable.
How soon will I return to normal life after EBK?
The corneal epithelium heals within 2–3 days, faster than with PRK. Most patients can return to work after 3–5 days. Vision stabilises within 2–4 weeks. Light sport is usually possible after 2 weeks and intensive sport after one month. Full stabilisation within 2–3 months.
Does EBK hurt?
No. The procedure is performed under topical anaesthesia (anaesthetic eye drops). You may feel a slight pressure during the procedure, but no pain. Afterwards, you may experience some discomfort — burning and tearing — for 1–2 days, but this is typically less than with classic PRK, due to the preservation of the Bowman's layer.
What is EBK?
EBK (Epi-Bowman's Keratectomy) is a modern surface laser ablation method and an evolution of PRK. The key difference: we preserve the Bowman's layer, which ensures better corneal biomechanics and faster healing. We remove only the corneal epithelium, then the excimer laser reshapes the tissue. It is a suitable option for patients with thin corneas.