Australian researchers reported in the journal Ophthalmology that at least 75% of teens with keratoconus -- a corneal structure degeneration -- who underwent corneal transplants achieved 20/40 vision and 90% had healthy corneas 10 years after the transplantation. Researchers said fewer than 40% of children below age 5 and 70% of 5- to 12-year-olds still had viable corneas 16 years and 22 years, respectively, after the transplant.

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