A monocentric, parallel-arm, prospective, randomized therapeutic trial that compares the
efficacy of two curative keratoconus treatment techniques by cross-linking collagen
(accelerated conventional technique or iontophoresis). The primary endpoint will be the depth
of the demarcation line measured by confocal microscopy and OCT at 1 month. This line
represents the limit depth between treated and untreated stroma.