Posters

Effect of daily disposable soft contact lenses on the tear film quality, assessing the higher-order aberrations after blinking

Poster Details

First Author: A.Moulakaki SPAIN

Co Author(s):    A. Recchioni   A. Del Aguila-Carrasco   J. Esteve-Taboada   R. Montes-Mico     

Abstract Details

Purpose:

To evaluate whether different daily disposable soft contact lenses of various water content influence on the quality of the tear film, by assessing sequential postblink changes occur to the Higher-Order Aberrations (HOAs) of the eyes.

Setting:

University of Valencia, Valencia, Spain

Methods:

Twelve healthy subjects wearing three different daily disposable soft contact lenses with spherical ametropia ± 4.25 D and no astigmatism were enrolled in this study. One of these contact lenses was characterized by a different core and surface water content. While, the other two lenses had a particular but different water content. Ocular HOAs were measured sequentially for 12 seconds without blinks, by using a Hartmann-Shack wavefront aberrometer and customized software. The acquired aberration data were analysed for a 4mm pupil diameter, in terms of coma-like, spherical-like and total HOAs up to the sixth order Zernike polynomials.

Results:

Total HOAs significantly increased with time after a blink for all subjects, who wore the daily disposable contact lenses with the particular but different water content. Nonetheless, a slight decrease in HOAs was evident in the first few seconds after a blink with these contact lenses. On the contrary, the contact lens with the different core and surface water content demonstrated apparent variations in the total HOAs pattern for all subjects. Overall, the acquired data showed discernible differences between the three daily disposable soft contact lenses for 4 mm pupil measurements.

Conclusions:

Each contact lens induced changes in optical aberrations created by tear-film breakup, associated with reduction in retinal image quality. These changes varied substantially from individual to individual, as the tear film is unstable and irregular in eyes wearing contact lenses. Therefore, sequential measurements of ocular HOAs may be effective as a non-invasive and objective method to assess the tear film dynamics after blinking, and consequently the quality of vision. FINANCIAL DISCLOUSRE: NONE