PTK Surgery

This is a therapeutic application of excimer laser in the management of anterior corneal diseases and is a new technique of Keratectomy for removing the scar tissue from the cornea. The excimer laser may provide a novel modality in the treatment of a number of superficial corneal disorders including Keratoconus. This treatment is known a Phototherapeutic Keratectomy. The indications include a variety of corneal degenerations and dystrophies, corneal irregularities, and superficial scars.

PTK minimizes tissue removal and therefore surgical trauma. The smoother stromal surface achieved by the excimer laser procedure may improve surface smoothness of the cornea, improve postoperative corneal clarity and decrease postoperative scarring, and facilitate subsequent epithelial adhesion.

Moreover superficial corneal disorders, which in some cases would otherwise require a corneal transplant may be amenable to treatment with the PTK procedure. PTK has a dual approach in pain management and improving the visual acuity. Unlike the excimer laser PRK or LASIK technique for correction of refractive errors, PTK treatments will vary with different corneal disorders, and the clinical goals of the procedure may, likewise, vary depending upon the patient’s symptoms.

Clinical indications for Phototherapeutic Keratectomy (PTK):

A: To improve vision

  • Keratoconus with irregular astigmatism
  • Band keratopathy
  • Reis bucklers
  • Shallow corneal scar
  • Lattice dystrophy and granular dystrophy
  • Severe astigmatism following corneal graft surgery (frequently combined with Photorefractive Keratectomy (PRK) to improve the end result).
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    B: To improve symptomatic eye status (reduce eye pain and improve eye comfort)

  • Anterior basement membrane epithelial dystrophy (ABMD)
  • Phakic or aphakic bullous keratopathy
  • Recurrent corneal erosion syndrome (RCES) from trauma
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