Relationship between contrast sensitivity and corneal shape following overnight orthokeratology

• DOI: 10.18240/ijo.2019.02.14
• Publication Date: 2019-01-31T08:41:01Z
• Authors: Li‐Li Liu; Li-Ping Gong; Yueyuan Xu; Xuan Zhu; Kaddie Kwok Chen; Weifeng Liu
• Keywords: Orthokeratology

AIM: To evaluate the relationship between contrast sensitivity (CS) and corneal shape following overnight orthokeratology (OK). METHODS: We conducted a retrospective clinical study of 80 lens-wearing myopia patients, all whom had undergone OK been evaluated by Orbscan II topography. measured surface irregularity index (SIRI) topography at 3 5 mm, size flattened central curvature lens (zone A), cornea altered B), pupillary area level C), crossover zones A C AC), B (BC), ratio BC to (BC/B), AC (AC/C). CS was using CSV-1000 with spatial frequencies 3, 6, 12, 18 cycles/degree (CPD). RESULTS: Multiple correlation analyses indicated significant negative correlations CS, zone C, BC/B, 3-mm SIRI (all P<0.01). There were no differences B, AC/A, or 5-mm (P=0.60, 0.94 0.11, respectively). Zone negatively correlated CPD. BC/C 6 AC/C positively CONCLUSION: BC/B affect OK.