The Topographical Effect of Optical Zone Diameter in Orthokeratology Contact Lenses in High Myopes

Figure 3

Mean corneal radius differences along the horizontal axis between baseline (before orthokeratology wearing) and day 15 for 5 mm and 6 mm OZ lens designs (BASELINE-15 d). Standard deviation has been removed for a better profile comprehension. Negative values mean flattening and positive values mean steepening. Complete data are show in Table 4. OZT: optical zone treatment; PRW: peripheral ring power.