Table 2.
The nominal and the mean ± std dev of five repeated EFP measurements on NIMO of the BK-7 calibration glass lenses.
| BK-7 calibration glass lens | Nominal BVP as certified (D) | CT (mm) | Converted nominal EFP (D) | Measured EFP on NIMO (D) | Difference (D) (measured − nominal) |
|---|---|---|---|---|---|
| Plus lenses | 2.000 | 3.049 | 1.99 | 1.96 ± 0.00 | −0.03 |
| 4.038 | 3.069 | 4.01 | 3.99 ± 0.01 | −0.01 | |
| 5.088 | 2.906 | 5.04 | 5.03 ± 0.01 | −0.01 | |
| 10.306 | 2.996 | 10.10 | 10.10 ± 0.00 | 0.00 | |
| 14.268 | 2.386 | 13.96 | 13.94 ± 0.00 | −0.02 | |
| 20.759 | 3.056 | 19.93 | 19.92 ± 0.00 | −0.01 | |
| Minus lenses | −19.607 | 1.545 | −20.01 | −19.99 ± 0.00 | 0.02 |
| −15.706 | 2.069 | −16.05 | −16.01 ± 0.00 | 0.04 | |
| −10.022 | 1.512 | −10.12 | −10.15 ± 0.00 | −0.03 | |
| −4.993 | 1.470 | −5.02 | −5.05 ± 0.00 | −0.03 | |
| −3.971 | 2.106 | −3.99 | −4.01 ± 0.00 | −0.02 | |
| −1.992 | 1.487 | −2.00 | −2.00 ± 0.00 | 0.00 |