Intracorneal Ring Segments (ICRS) for Keratoconus

Intrastromal Corneal Segments (ICRS)

Intrastromal corneal segments (ICRS) are an ophthalmic medical device designed for the reduction or elimination of myopia and astigmatism in patients with keratoconus so that their functional vision may be restored and the need for a corneal transplant procedure can potentially be deferred.

Before The Procedure

Prior to any surgical procedure it is common to experience a degree of anticipation and anxiety. It may be comforting to know that the intra corneal segments procedure is far less invasive than a corneal transplant or many other surgical procedures of the eye and the success rate is high. The surgeons performing the procedure are typically corneal surgeons, that have expertise with keratoconus.

Typically, your ophthalmologist will have you undergo a thorough eye examination.

Your examination will include a variety of standard ophthalmic tests for this type of procedure, as well as general medical tests and a review of your specific medical history.

The Procedure

Anesthetic drops are used to numb the eye, which is held open throughout the procedure to prevent blinking.

Channels to receive the ICRS are done my means of a high precise femtosecond laser.

The implants are gently placed.

The placement of the ICRS reshape and reinforce your cornea, eliminating some or all of the irregularities caused by keratoconus in order to provide you with improved vision.

 

After the Procedure

Follow-up visits will be required to monitor the healing process and evaluate the visual benefits of the procedure. Even after a successful procedure, glasses or contacts still may be required to provide you with good vision.

As with any surgical procedure, some risks are involved, including infection. Some patients experience visual symptoms which include difficulty with night vision, glare, halos, blurry and fluctuating vision.

ICRS are specially designed implants, made of medical plastic, which are surgically placed under the surface of the cornea. Due to their unique patented design, they are able to remodel the architecture of the cornea re-establishing a more natural dome-like shape and improving one’s vision.

Advantages

  • It causes no histological changes in the central cornea and maintain the natural state of cornea
  • The potential reversibility to the situation before the surgery –they can be removed if needed.
  • ICRS implantation, on average, improves two- line visual acuity in 50% of patients with Keratoconus, although some patients may have a more pronounced improvement. In fact, in patients with Keratoconus, this action causes the patient who before surgery did not have a good vision with glasses, after ring implantation and due to the loss of corneal irregularity, has a better vision with new glasses compared to before.

Risks and side effects

Although the practice of Intra Corneal ring segments has been approved by the FDA, but it should be known that similar to other refractive correction procedures, it can have some side effects. The most important ones are:

  •  Postoperative infections
  •  Hypo-correction
  • Hyper-correction
  •  Halos, glare, and fluctuating distance vision., especially at night
  •  Light Sensitivity
  •  Night vision difficulty
  •  Corneal oedema.

But in general, no vision-threatening complications have been observed.

Risks and side effects

Although the practice of Intra Corneal ring segments has been approved by the FDA, but it should be known that similar to other refractive correction procedures, it can have some side effects. The most important ones are:

  •  Postoperative infections
  •  Hypo-correction
  • Hyper-correction
  •  Halos, glare, and fluctuating distance vision., especially at night
  •  Light Sensitivity
  •  Night vision difficulty
  •  Corneal oedema.

But in general, no vision-threatening complications have been observed.