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Effect of laser in situ keratomileusis on vision analyzed using preoperative optical quality
Meritxell Vilaseca1, Adenay Padilla, Juan C Ondategui
1Centre for Sensors, Universitat Politècnica de Catalunya, Barcelona, Spain. mvilasec@oo.upc.edu
Purpose:
To evaluate the effect on vision of laser in situ keratomileusis (LASIK) based on preoperative optical quality.
Setting:
Universitat Politècnica de Catalunya, Terrassa, and Barcelona Institute of Ocular Microsurgery, Barcelona, Spain.
Design:
Comparative case series.
Methods:
The relative change in optical quality and visual acuity were evaluated in eyes that had LASIK for myopia. The optical quality was assessed before and 3 months after surgery using parameters provided by a double-pass system. Patients were classified into 4 groups by preoperative optical quality: low (Group 1), moderate (Group 2), high (Group 3), and very high (Group 4).
Results:
The study evaluated 25 patients (50 eyes). The optical quality parameters improved postoperatively in Group 1 and Group 2, with the improvement ranging from 15% to 21% and from 13% to 17%, respectively. The preoperative and postoperative optical quality in Group 3 was similar. The optical quality in Group 4 worsened significantly by percentages ranging from -20% to -26%. Although visual acuity had the same trend, there were no statistically significant changes.
Conclusion:
The changes in optical quality after LASIK surgery depended on the patient's preoperative optical quality; visual acuity showed the same trend, although no change was significant.
