Abstract
The study evaluated the results of IOL power calculation using Shammas PL no history formula in eyes with previous laser in situ keratomileusis (LASIK). This was a longitudinal follow-up descriptive analysis study. IOL power was calculated with Shammas PL formula with the ASCRS online calculator. Results: 41 eyes of 27 patients matched the inclusion and exclusion criteria. The mean uncorrected distance vision acuity (UDVA) and corrected distance vision acuity (CDVA) 3 months after surgery were 0.42 ± 0.23; 0.25 ± 0.19 logMAR, respectively. The number of eyes within ± 0.5 D; ± 1.0 D accounted for 48.8%, 75.6%, respectively. Mean absolute error (MAE) 3 months after surgery was 0.68 ± 0.59. Of the 41 eyes, 20 eyes were relatively myopic-shifted (<-0.5 D), 20 eyes showed an emmetropic shift (-0.5 D ◊ +0.5 D), and one eye showed a hyperopic shift (> 0.5 D). There was no statistically significant difference in MAE between axial length groups. 82.7% were satisfied and very satisfied. Conclusion: Shammas PL formula may be a suitable option for eyes after previous LASIK with all different axial length with the high rate of satisfaction. With Shammas PL no history formula, myopic shifting was more common than emmetropic and hyperopic shifting.
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