Measurements
Adjust via slider or stepper buttons.
White-to-WhiteHorizontal corneal diameter
12.0 mm
K2Steep keratometry value
43.0 D
Recommended Ring Size
9.5
Ring
Normal eye
WTW above 11.8 up to 12.7 mm with K2 between 41 and 44 D.
⚠️
Caution – unusual eye!
WTW and K2 are discordant. The recommendation follows the K2 – please review the findings critically.
Borderline zone
The values fall between the defined categories – recommendation follows the K2 tendency; please verify clinically.
§
The Scheme at a Glance
The currently matching row is highlighted in gold. In discordant findings (WTW and K2 contradict each other), the K2 decides.
| Constellation | White-to-White | K2 | Ring | Note |
|---|---|---|---|---|
| Very steep small eye | < 11.4 mm | > 45.5 D | 8.5 | |
| Small eye | 11.4 – 11.8 mm | > 44.5 D | 9.0 | |
| Normal eye | > 11.8 – 12.7 mm | 41 – 44 D | 9.5 | |
| Large eye | ≥ 12.8 mm | < 41.5 D | 10 | |
| Large eye, steep K2 | ≥ 12.8 mm | > 45 D | 9.0 | decide by K2 · Caution! |
| Small eye, flat K2 | < 11.5 mm | < 41.5 D | 9.5 | decide by K2 · Caution! |