Predictability of Objective Postoperative Day-1 Aberrometry of Final Refractive Outcome 1 Year After LASIK for Myopia
Purpose
To determine if objective wavefront aberrometric refractions one day after myopic LASIK are predictive of objective and subjective refractions at postoperative year one.
Methods
Ninety-four eyes of forty-seven myopic patients underwent wavefront-guided LASIK. Objective wavefront aberrometric refractions were recorded preoperatively, at postoperative day one and at postoperative year one. Subjective manifest refractions were also collected at postoperative year one.
Results
When comparing objective wavefront aberrometric refractions at postoperative year one to postoperative day one, there was a mean 0.30 diopter spherical equivalent myopic shift. There was no significant difference in the number of eyes within 0.50 diopters of emmetropia measured by wavefront aberrometric refraction at postop day one or year one. There was a correlation of R=0.66 (p<0.001) when comparing wavefront aberrometric spherical equivalent refraction at postop day one and year one. There was a correlation of R=0.53 (p<0.001) when comparing wavefront aberrometric spherical equivalent refraction at postop day one with subjective spherical equivalent refraction at year one. Eyes with higher levels of myopia (>4.00 diopters) had significantly more refractive shift than eye with lower levels of myopia (0.44 diopter vs. 0.21 diopters, respectfully) (p -0.014).
Conclusion
Postoperative day one wavefront aberrometric refractions correlate well with objective and subjective refractive outcomes at postoperative year one after myopic LASIK.