Limits...
Clinical outcomes of wavefront-guided laser in situ keratomileusis to treat moderate-to-high astigmatism.

Schallhorn SC, Venter JA, Hannan SJ, Hettinger KA - Clin Ophthalmol (2015)

Bottom Line: Preoperative refractive cylinder ranged from -2.00 D to -6.00 D (mean -2.76±0.81 D), and the sphere was between 0.00 D and -9.75 D (mean -2.79±2.32 D).The mean correction ratio for refractive cylinder was 0.92±0.14, the mean error of angle was -0.45°±2.99°, and the mean error vector was 0.37±0.38 D.A statistically significant correlation was found between the error of magnitude (arithmetic difference in the magnitudes between surgically induced refractive correction and intended refractive correction) and the intended refractive correction (r=0.26, P<0.01).

View Article: PubMed Central - PubMed

Affiliation: University of California, San Francisco, CA, USA ; Optical Express, Glasgow, UK.

ABSTRACT

Purpose: The purpose of this study was to evaluate the refractive and visual outcomes of wavefront-guided laser in situ keratomileusis (LASIK) in eyes with myopic astigmatism and cylindrical component ≥2.0 diopter (D).

Methods: In this retrospective study, 611 eyes that underwent LASIK for simple or compound myopic astigmatism were analyzed. Preoperative refractive cylinder ranged from -2.00 D to -6.00 D (mean -2.76±0.81 D), and the sphere was between 0.00 D and -9.75 D (mean -2.79±2.32 D). Predictability, visual outcomes, and vector analysis of changes in refractive astigmatism were evaluated.

Results: At 3 months after LASIK, 83.8% of eyes had uncorrected distance visual acuity of 20/20 or better, 90.3% had manifest spherical equivalent within ±0.50 D, and 79.1% had residual refractive cylinder within ±0.50 D of intended correction. The mean correction ratio for refractive cylinder was 0.92±0.14, the mean error of angle was -0.45°±2.99°, and the mean error vector was 0.37±0.38 D. A statistically significant correlation was found between the error of magnitude (arithmetic difference in the magnitudes between surgically induced refractive correction and intended refractive correction) and the intended refractive correction (r=0.26, P<0.01).

Conclusion: Wavefront-guided LASIK for the correction of myopic astigmatism is safe, effective, and predictable.

No MeSH data available.


Related in: MedlinePlus

Comparison of postoperative cumulative monocular UDVA and preoperative CDVA.Abbreviations: UDVA, uncorrected distance visual acuity; CDVA, corrected distance visual acuity.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4508064&req=5

f1-opth-9-1291: Comparison of postoperative cumulative monocular UDVA and preoperative CDVA.Abbreviations: UDVA, uncorrected distance visual acuity; CDVA, corrected distance visual acuity.

Mentions: Significant improvement in UDVA and CDVA was observed comparing preoperative and 3 months postoperative data (P<0.01; Table 2). Figure 1 shows postoperative UDVA against preoperative CDVA; there was no statistically significant difference found between the two variables (P=0.06). The percentages of eyes achieving UDVA of 20/20 or better were 80.9% (494 eyes), 83.0% (507 eyes), and 83.8% (512 eyes) at 1 week, 1 month, and 3 months, respectively. The changes in CDVA between preoperative and 3 months postoperative visit were as follows: loss of two lines or more, 0.8% (five eyes); loss of one line, 6.1% (37 eyes); unchanged, 65.1% (398 eyes); gain of one line, 23.6% (144 eyes); and gain of two lines or more, 4.4% (27 eyes).


Clinical outcomes of wavefront-guided laser in situ keratomileusis to treat moderate-to-high astigmatism.

Schallhorn SC, Venter JA, Hannan SJ, Hettinger KA - Clin Ophthalmol (2015)

Comparison of postoperative cumulative monocular UDVA and preoperative CDVA.Abbreviations: UDVA, uncorrected distance visual acuity; CDVA, corrected distance visual acuity.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4508064&req=5

f1-opth-9-1291: Comparison of postoperative cumulative monocular UDVA and preoperative CDVA.Abbreviations: UDVA, uncorrected distance visual acuity; CDVA, corrected distance visual acuity.
Mentions: Significant improvement in UDVA and CDVA was observed comparing preoperative and 3 months postoperative data (P<0.01; Table 2). Figure 1 shows postoperative UDVA against preoperative CDVA; there was no statistically significant difference found between the two variables (P=0.06). The percentages of eyes achieving UDVA of 20/20 or better were 80.9% (494 eyes), 83.0% (507 eyes), and 83.8% (512 eyes) at 1 week, 1 month, and 3 months, respectively. The changes in CDVA between preoperative and 3 months postoperative visit were as follows: loss of two lines or more, 0.8% (five eyes); loss of one line, 6.1% (37 eyes); unchanged, 65.1% (398 eyes); gain of one line, 23.6% (144 eyes); and gain of two lines or more, 4.4% (27 eyes).

Bottom Line: Preoperative refractive cylinder ranged from -2.00 D to -6.00 D (mean -2.76±0.81 D), and the sphere was between 0.00 D and -9.75 D (mean -2.79±2.32 D).The mean correction ratio for refractive cylinder was 0.92±0.14, the mean error of angle was -0.45°±2.99°, and the mean error vector was 0.37±0.38 D.A statistically significant correlation was found between the error of magnitude (arithmetic difference in the magnitudes between surgically induced refractive correction and intended refractive correction) and the intended refractive correction (r=0.26, P<0.01).

View Article: PubMed Central - PubMed

Affiliation: University of California, San Francisco, CA, USA ; Optical Express, Glasgow, UK.

ABSTRACT

Purpose: The purpose of this study was to evaluate the refractive and visual outcomes of wavefront-guided laser in situ keratomileusis (LASIK) in eyes with myopic astigmatism and cylindrical component ≥2.0 diopter (D).

Methods: In this retrospective study, 611 eyes that underwent LASIK for simple or compound myopic astigmatism were analyzed. Preoperative refractive cylinder ranged from -2.00 D to -6.00 D (mean -2.76±0.81 D), and the sphere was between 0.00 D and -9.75 D (mean -2.79±2.32 D). Predictability, visual outcomes, and vector analysis of changes in refractive astigmatism were evaluated.

Results: At 3 months after LASIK, 83.8% of eyes had uncorrected distance visual acuity of 20/20 or better, 90.3% had manifest spherical equivalent within ±0.50 D, and 79.1% had residual refractive cylinder within ±0.50 D of intended correction. The mean correction ratio for refractive cylinder was 0.92±0.14, the mean error of angle was -0.45°±2.99°, and the mean error vector was 0.37±0.38 D. A statistically significant correlation was found between the error of magnitude (arithmetic difference in the magnitudes between surgically induced refractive correction and intended refractive correction) and the intended refractive correction (r=0.26, P<0.01).

Conclusion: Wavefront-guided LASIK for the correction of myopic astigmatism is safe, effective, and predictable.

No MeSH data available.


Related in: MedlinePlus