Intrastromal Corneal Ring Segments (INTACS)


Intrastromal Corneal Ring Segments (INTACS) is a non-laser procedure that involves implanting two tiny plastic arcs in the cornea.  These crescents are placed in the outer edge of the cornea and opposite each other.  When placed, INTACS stretch the cornea to make it flatter.

Since the procedure is used to flatten a steep cornea, nearsighted patients benefit the most.  The level of nearsightedness should be mild, and the patients should have little or no astigmatism.  The advantage of this procedure is that the ring segments can be removed or exchanged. INTACS are also used as a treatment for keratoconus (link to the keratoconus patient education video) patients.


  • For patients with progressive keratoconus, Intacs may defer a corneal transplant
  • Reversible
  • Patients may achieve a better fit and hence a more comfortable fit with their contact lenses


  • Postoperative discomfort/pain for 1 to 4 days
  • Fluctuating vision for weeks to months after the procedure
  • Vision may not improve or change
  • Intrastromal Corneal Ring Segments (INTACS)

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