Paired arcuate and modified circular keratotomy in keratoconus

Figure 1 The treatment addresses the irregularity of the cornea and the steepness of the meridian. A: Represents the angular circumference of the cornea; B: Illustrates one possible calculation and location for the paired arcuate incisions; C: Illustrates the combination of the arcuate keratotomy and modified form of circular keratotomy; D: The yellow arc marks the area of low corneal power from 210° to 330° and indicates an area of 90% incision depth, while the incision in the red area would be at a depth of 70%.