Resumen de Intraocular straylight and contrast sensitivity two months after LASIK

Ralph Michael, Gustavo A. Montenegro, Rafael Ignacio Barraquer Compte

• PURPOSE: To study the effect of Laser in-Situ Keratomileusis on intraocular straylight and contrast sensitivity.

  METHODS: Altogether 46 eyes of 28 patients (mean age 30 years; refractive error range 3.5 to -8.0 D) were treated for LASIK with Bausch & Lomb Technolas Z100 and studied pre-op and two-month post-op. Intraocular straylight was measured with the Oculus CQuant and contrast sensitivity with the CSV-1000 (at 3, 6, 12, 18 cycles/degree).

  RESULTS: Pre-op mean straylight parameter did not change at two months post-op. Only one eye out of 46 had straylight values increased by more than 0.25 log units. There was no significant change in contrast sensitivity at all four spatial frequencies. We found a significant improvement of post-op contrast sensitivity when we excluded 10 eyes that presented variations of two or more positions in contrast sensitivity.

  CONCLUSION: Mean straylight and contrast sensitivity did not change two months after LASIK. Both visual quality measures worsened in a few cases but remained constant or improved slightly in the majority of the cases.

  SYNOPSIS: Mean C-Quant measurements of intraocular straylight, and contrast sensitivity at 3, 6, 12, 18 cycles/degree did not change significantly two months after LASIK