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Liquid Optics™ interface of Catalys® as optical resource for low visual patients

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Session Details

Session Title: Presented Poster Session: Quality of Vision/Miscellaneous

Venue: Poster Village: Pod 3

First Author: : N.Yanagimori BRAZIL

Co Author(s): :    O. Naves   R. Hida   P. Froiman   A. Carvalho   G. Rinaldo   I. Teixeira

Abstract Details


Improve the functional capacity and independence of the visually impaired by transforming Liquid opticsTM interface of Catalys®, which would be discarded, for visual rehabilitation as a low-cost optical resource. Therefore, contributing to the environmental sustainability and social inclusion of patients with low vision and low income. 


Irmandade Santa Casa de Misericórdia de São Paulo.


Patients with low vision and who never used magnifying lens were selected to participate in the current prospective study. They were trained for 1 month with the Liquid opticsTM interface of Catalys® as magnifying lens, which was fitted with a holder made of recyclable material from the top of a transparent PET bottle with 11.5 centimeter height. It was evaluated by a questionnaire identified as National Eye Institute-Visual Function Questionnaire-25 (NIV VFQ-25) and the MNREAD® test adapted to Portuguese. They were applied by the author in two distinct moments, before and after training, with and without the optical resource.


Ten patients were evaluated, being 7 women and 3 men. All with subnormal vision and different diagnoses (advanced glaucoma, Neovascular age-related macular degeneration, retinitis pigmentosa and proliferative diabetic retinopathy). The mean age was 56.9 ± 19.12 years. The difference, with and without the optical resource, of Reading parameters of patients examined by MNREAD, after training were: maximum reading speed (MRS), 8.90 ± 14.98 words per min.; critical print size (CPS), 0.24 ± 0.16 logMAR; reading acuity (RA), 0.28 ± 0.14 log MAR. Furthemore, the variation of NIV VFQ-25 in first and second moments was 13.13 ± 5,01 score points.


Low vision deteriotes the quality of life by making simple daily activities, such as reading, more difficult and complex to be done. The Liquid opticsTM interface of Catalys® as optical resource increased the reading parameters, quantitatively, and reflected in improvement of the total score of NIV VFQ-25. In addition, it was recycled, giving another funcion to what was considered hospital waste.

Financial Disclosure:


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