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Impressum
Intracorneal Ring Segments (ICRS) in Keratoconus
Rehfeldt K., Höh H.
Klinikum Neubrandenburg, Augenklinik
Background: Perforating keratoplasty is the ultima ratio in advanced
keratoconus with impossibility of correction by spectacles and unablity
of contact lens wearing. ICRS can occasionelly help to restore the corneal
ability of fitting contact lenses or the possibility of correction by
spectacles.
Patients: In December 2000, we implanted ICRS in two eyes of two
patients (1 female, 17 years; 1 male, 58 years) with advanced keratoconus.
Both patients showed an intolerance of wearing contact lenses. A keratoplasty
lay ahead. In both patients, ICRS was implanted in retrobulbar anesthesie.
Results: Postoperatively, best contact lens corrected visual acuity
increased from (Fingerzählen) to 0.25 and from 0.05 to 0.4. In the
male patient, the corneal curvature became significantly flatter. The
young patient showed even preoperatively a central cloudy cornea with
a speedy progredient keratoconus; postoperatively, the central cornea
became steeper, but a contact lens fitting was possible.
Conclusion: In our both patients with keratoconus, corneal surface
could be changed in that way, that a contact lens can be fitted or a correction
by spectacles can be performed. Keratoplasty could be delayed. These cases
confirm the cases described in literature. The durance of the effect is
not yet known.