Relationship between Uncorrected Visual Acuity and Refractive Error after Refractive Surgery.

Sabong Srivannaboon, M.D.
Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital


ABSTRACT Purpose : To find the correlation between residual refractive error after refractive surgery and uncorrected visual acuity.

Methods : A retrospective study of 294 eyes in 215 consecutive patients who underwent refractive surgery by LASIK methods was done. Regression analysis was used to find the correlation between uncorrected visual acuity and residual refractive error.

Results : There was statistically significant of positive correlation between both parameters (p < 0.001) by regression determination (R²) of 0.77, F statistic of 127.5. The prelim inary finding also suggest that the uncorrected visual acuity after refractive surgery is better than expected value from previous studies in the same amount of refractive error.

Conclusion : The magnification theory and multifocality theory was applied to explain the result in this study.

Thai J Ophthalmol 1997 ; July-December 11(2): 113-122.