Table 3 Prevalence (%) and 95% CI of Atypical Retardation Pattern (ARP) by GDx variable corneal compensation (VCC) and enhanced corneal compensation (ECC) scans in each myopic group
Moderate myopiaHigh myopia
VCC % (95% CI)ECC % (95% CI)VCC % (95% CI)ECC % (95% CI)
No ARP65.0 (48.9 to 77.8)100 (82.8 to 100)45.7 (30.3 to 62.2)91.4 (75.2 to 96.6)
Mild ARP25.0 (14.5 to 41.2)0 (0 to 17.2)14.3 (6.7 to 31.2)8.6 (3.4 to 24.8)
Severe ARP10.0 (4.4 to 24.9)0 (0 to 17.2)40.0 (25.6 to 57.0)0 (0 to 19.3)

  • No ARP = no atypical retardation pattern (TSS value of 80–100); mild ARP = mild atypical retardation pattern (TSS value of 60–79); severe ARP = severe atypical retardation pattern (TSS value below 60).