Intracorneal ring segments are among the best treatments currently available for patients with moderate keratoconus. Several types exist, but in the United States, the Intacs segment is the only FDA-approved model.
Intacs (CorneaGen) are not a new technology, which is an advantage because it means there are decades worth of publications corroborating their safety and efficacy. The average keratoconic cornea flattens 4 D in response to Intacs implantation. Practically, this produces a gain of two or more Snellen lines in two-thirds of patients treated. This visual benefit is realized almost
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