April 2011
Volume 52, Issue 14
Free
ARVO Annual Meeting Abstract  |   April 2011
Determination Of Changes In Contrast Sensitivity In Myopic Patients With LASIK Surgery
Author Affiliations & Notes
  • Simon Romano-Bucay
    Hospital Nuestra Senora de la Luz, Huixquilucan, Mexico
  • Regina Velasco-Ramos
    Hospital Nuestra Senora de la Luz, Mexico City, Mexico
  • Oscar Baca-Lozada
    Hospital Nuestra Senora de la Luz, Mexico City, Mexico
  • Oscar Fernandez-Vizcaya
    Hospital Nuestra Senora de la Luz, Mexico City, Mexico
  • Alejandro Babayan-Sosa
    Hospital Nuestra Senora de la Luz, Huixquilucan, Mexico
  • Footnotes
    Commercial Relationships  Simon Romano-Bucay, None; Regina Velasco-Ramos, None; Oscar Baca-Lozada, None; Oscar Fernandez-Vizcaya, None; Alejandro Babayan-Sosa, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science April 2011, Vol.52, 5746. doi:https://doi.org/
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      Simon Romano-Bucay, Regina Velasco-Ramos, Oscar Baca-Lozada, Oscar Fernandez-Vizcaya, Alejandro Babayan-Sosa; Determination Of Changes In Contrast Sensitivity In Myopic Patients With LASIK Surgery. Invest. Ophthalmol. Vis. Sci. 2011;52(14):5746. doi: https://doi.org/.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose: : To compare contrast sensitivity in myopic patients who underwent LASIK surgery.

Methods: : A prospective study in patients with myopic eyes, 18 years older, whose contrast sentivity was examined prior to LASIK surgery. Patients were selected having no prior surgeries and no other ocular diseases. The contrast sensitivity was measured using Sine Wave Contrast Test (SWCT). The results were analyzed using Student’s T test for paired measures and Mann-Whitney U test using SPSS v12.

Results: : We included 50 eyes of 25 patients grouped by spherical equivalent in low-moderate myopia (<-6.00D) and high myopia (>-6.00D). The contrast sensitivity changes observed at medium to high spatial frequencies (6, 12 and 18c/deg) were statistically significant in the general population and the high myopia group P value = 0.001. The patients in the low-moderate myopia group had no statistically significant differences (p = 0.325).

Conclusions: : We observed changes in contrast sensitivity especially in middle and high spatial frequencies. This translates into an increase in discomfort in lower lighting conditions therefore we can infer that patients will experience discomfort at night that cannot be explained by induced aberrations of the optical system.

Clinical Trial: : Fundacion Hospital Nuestra Senora de la Luz, 0

Keywords: contrast sensitivity • refractive surgery: LASIK 
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