Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Predictability outcomes according to the grade of keratoconus.
| Grade Mean keratometry |
Low ≤ 48 D | Moderate > 48 D, ≤55 D | Severe > 55 D | P value |
|---|---|---|---|---|
| Number of eyes (%) | 70 (69%) | 25 (25%) | 7 (7%) | |
| Prediction error | 0.09 (−0.42, 0.58) D | 0.52 (−1.08, −2.78) D | 3.79 (2.90, 6.50) D | <0.001 |
| Absolute error | 0.52 (0.21, 0.89) D | 1.47 (0.64, 2.78) D | 3.79 (2.90, 6.50) D | <0.001 |
| within ±0.5D (%) | 33 (47%) | 4 (16%) | 0 (0%) | |
| within ±1.0D (%) | 56 (80%) | 8 (32%) | 0 (0%) |
D = diopter.
