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Improvement Of Best Spectacle-corrected Visual Acuity After Lasik In Highly Myopic Eyes
Improvement of best spectacle-corrected visual acuity after LASIK in highly myopic eyes with reduced preoperative best spectacle-corrected visual acuity.
Author: He R , Qu M , Fen Y , Yu S
Source: J Refract Surg, 22(9 Suppl): S1053-5 2006
Summary of Research:
The purpose of the study was to evaluate the visual acuity after LASIK in patients with high myopia and in patients with preoperative best spectacle-corrected visual acuity (BSCVA) <0.6.
The methods used in the research:
This retrospective study comprised 97 consecutive eyes in 57 patients who underwent LASlK. Preoperative spherical refractive error ranged from -1.75 to -22.00 diopters (D) (mean: -11.77+/-3.61 D) with mean astigmatism of -1.54+/-10.6 (range: 0 to -4.00 D). Pre- and postoperative
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BSCVA and uncorrected visual acuity (UCVA) were measured and analyzed.
Results & Conclusion:
The mean preoperative BSCVA was 0.54+/-0.07 (range: 0.3 to 0.6). The mean postoperative BSCVA was 0.75+/-0.16 (range: 0.5 to 1.2). The mean postoperative UCVA was 0.60+/-0.25 (range: 0.5 to 1.2). A statistically significant improvement was noted in the mean postoperative BSCVA compared with the mean preoperative BSCVA (t=12.78; P<.001) and mean postoperative UCVA compared with preoperative mean BSCVA (t=2.866; P<.01). The safety index was 1.38, which was statistically significant (P<.001). The efficacy index was 1.11, which was statistically significant (P<.01).
CONCLUSIONS:
LASIK improved the mean postoperative BSCVA and UCVA compared with preoperative BSCVA in highly myopic eyes with reduced BSCVA.
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