Laser vision correction procedures have become a popular and effective option for correcting vision, offering freedom from glasses and contact lenses. However, not everyone is a candidate for Laser vision correction, and corneal thickness plays a crucial role in determining eligibility. At Hunter Street Eye Specialists, Dr. Peter Sumich emphasises the importance of corneal health in ensuring safe and successful laser vision correction.

Why Does Corneal Thickness Matter?

Laser vision correction procedures such as LASIK, TransPRK, and Lenticule based procedures such as SmartSight, SILK & SMILE, involve reshaping the cornea with a laser to correct refractive errors like myopia (short-sightedness), hyperopia (long-sightedness), and astigmatism. Since a portion of the cornea is removed during the process, sufficient thickness is needed to:

• Maintain the structural integrity of the cornea post-surgery.
• Prevent complications such as corneal ectasia (a condition where the cornea weakens and bulges forward).
• Ensure a safe level of tissue remains after the laser correction

How is Corneal Thickness Measured?

Before laser vision correction, your Dr Peter Sumich and team will measure your corneal pachymetry, which determines the corneal thickness in microns. The average human central corneal thickness is about 540 microns thick, though this varies from person to person.

Minimum Corneal Thickness Requirements for Laser Vision Correction

While the specific requirement depends on your prescription and eye anatomy, a safe range typically follows these guidelines:

• The cornea should generally be at least 480–500 microns thick before any treatment depending on your prescription – less for PRK or TransPRK.
• A minimum of 250 microns of residual stromal thickness must remain after the procedure to prevent complications.
• Higher prescriptions require more corneal tissue removal, meaning patients with thin corneas may not be ideal candidates for certain laser vision correction procedures.

What if My Cornea is Too Thin for Any Laser Treatment?

If your cornea is thinner than the recommended threshold, alternative vision correction options may be better suited for you:

• CLE/RLE (Clear Lensectomy / Refractive Lens Exchange): An Intraocular lens (IOL) is implanted inside the eye – replacing the crystalline lens.
• ICL (Implantable Collamer Lenses): A lens is implanted inside the eye without removing corneal tissue or crystalline lens.

Ensuring Long-Term Corneal Health

Whether you’re considering LASIK or another vision correction procedure, corneal health is essential for optimal results. To maintain strong, healthy corneas:

• Avoid rubbing your eyes excessively, as this can contribute to corneal weakening.
• Wear UV-blocking sunglasses to protect against sun damage.
• Use artificial tears if you experience dry eyes, as dryness can affect corneal stability.
• Attend regular eye check-ups to monitor corneal thickness and overall eye health.

Final Thoughts

Corneal thickness is a key factor in determining laser vision correction eligibility and ensuring long-term vision stability. At Hunter Street Eye Specialists, Dr. Peter Sumich and team, take a personalised approach to assess your corneal health and recommend the safest and most effective vision correction option for you.

If you’re considering laser vision correction or want to explore alternative treatments, speak to one of our laser vision experts or send us an enquiry here.