Retinal straylight and light distortion phenomena in normal and post-LASIK eyes.
OBJECTIVE
To assess the relationship between measures of light distortion and retinal straylight in normal and post-LASIK subjects.


METHODS
Cross-sectional, non-randomized, masked observational case series


METHODS
Clinica Oftalmologica Novovision, Madrid, Spain.


METHODS
Thirty eyes from 30 healthy subjects (mean age 33.9 ± 8.3 years old; mean spherical equivalent (MSE) -2.06 ± 1.40 D) and thirty six eyes from thirty six refractive surgery patients (mean age 36.1 ± 7.7 years old; mean preop MSE -3.43 ± 2.23 D) were examined with the Starlights and the C-Quant straylightmeter in a case-control study.


RESULTS
The age of both treated and control groups was not statistically different (p > 0.05). Statistically significant differences between controls and post-LASIK eyes were found for luminous distortion index (LDI), but not for retinal straylight. Correlation analysis yielded significant correlation between retinal straylight Log(s) values and BCVA measures (r = 0.379, p = 0.002). Control subjects showed significant correlation between MSE and retinal straylight Log(s) values (r = -0.650, p < 0.001), while post-LASIK eyes showed a significant correlation between LDI and Log(s) values (r = 0.338, p = 0.044) and between Log(s) values and BCVA (r = 0.460, p = 0.005). Correlation between measures obtained by both methods was higher after LASIK than in control eyes, although values were quite scattered in any case.


CONCLUSIONS
Light distortion phenomena and retinal straylight measures are correlated in both normal and postsurgical eyes. Both parameters are increased in LASIK subjects compared to control non-operated subjects.
Optometry Research Group, Department of Optics, University of Valencia, Dr. Moliner, 50. 46100, Burjassot, Valencia, Spain. alejandro.cervino@uv.es
Alejandro
A
Cerviño
Cesar
C
Villa-Collar
Jose Manuel
JM
Gonzalez-Meijome
Teresa
T
Ferrer-Blasco
Santiago
S
García-Lázaro
D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D020731:Keratomileusis, Laser In Situ; D008027:Light; D008297:Male; D009216:Myopia / Q000503:physiopathology* / Q000534:rehabilitation / Q000601:surgery; D011184:Postoperative Period; D012160:Retina / Q000503:physiopathology* / Q000528:radiation effects; D012542:Scattering, Radiation; D014792:Visual Acuity
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