Table 6
Dynamic evaluation of the difference in corneal thickness comparing preoperative and 1 month postoperative values with pachymetry at 2 years. Proprietary software was used to subtract baseline pachymetry data from the pachymetry map obtained at the specified time. Two separate areas centred on the optical axis of the instrument (12.57 mm2) and at the incision site (12.57 mm2) were analysed, the overall peripheral corneal change was within plus or minus 40 μm in 78% of eyes examined (n = 91) 1 month after surgery and this percentage increased to 96.7% in 2 years
| Corneal region analysed | Change in pachymetry | |
|---|---|---|
| 2 years–1 month | 2 years–preop | |
| Mean (SD)* | Mean (SD)* | |
| *“−” indicates a relative decrease in thickness, “+” indicates a relative increase in thickness. | ||
| Central corneal thickness (μm) (single area of 12.57 mm2) | −8.6 (22.9) | −2.8 (19.2) |
| Corneal thickness of a single area (μm) (12.57 mm2) centred at the incision site | −8.7 (36.5) | +12.6 (35.4) |
| Difference between central and peripheral thickness | p = 0.484 | p = 0.0002 |
