Posters

Bandage lenses: effect on the patient’s visual performance

Poster Details

First Author: A. Domínguez-Vicent SPAIN

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

Abstract Details

Purpose:

To assess the in-vitro optical quality and power profile of bandage lenses as a function of the aperture.

Setting:

University of Valencia, Valencia, Spain.

Methods:

The NIMO TR1504 (Lambda-X, Belgium) was used to assess the power profile and Zernike coefficients of the Mini and Semi scleral lenses (Procornea, The Netherlands). Five powers per design were measured of each contact lens design, and ten measurements per lens were taken at 3 and 6 mm apertures. The optical quality of each lens was described in terms of Zernike coefficients and point spread function (PSF). A convolution of each lens PSF with an eye-chart image was also computed.

Results:

The optical power fluctuated less than 0.5 D along the optical zone of each lens. On the other hand, the optical power obtained for some lenses did not match with its corresponding nominal one, the maximum difference being 0.5 D. From an optical point of view, small differences were obtained among all lenses within the same design. Nevertheless, these differences showed small impact upon the image quality of each convolution.

Conclusions:

Insignificant power fluctuations were obtained along the optical zone measured for each scleral lens. Furthermore, the optical quality of both Mini and Semi scleral lenses showed to be independent of the lens power within the same aperture.

Financial Disclosure:

NONE