@article {1435400,
	title = {Translation and validation of the contact lens dry eye questionnaire-8 (CLDEQ-8) to the Spanish language},
	journal = {Cont Lens Anterior Eye},
	volume = {42},
	number = {2},
	year = {2019},
	month = {2019 Apr},
	pages = {155-158},
	abstract = {PURPOSE: To present the process of cultural and psychometric adaptation, and clinical validation of a new version in the Spanish language of the Contact Lens Dry Eye Questionnaire-8 (CLDEQ-8). MATERIALS AND METHODS: The translation-retro-translation method was applied to the CLDEQ-8 questionnaire. Two independent native Spanish-speaking translators adapted the questionnaire from English to Spanish, and then a committee of experienced clinicians (CE) evaluated the semantic equivalence and designed a Spanish version of the CLDEQ-8 questionnaire. The resulting translated version was tested conducting a pilot study in contact lens users and assessing their perception and overall understanding of the terminology. The results were analyzed and a final version was designed. The final version was retro-translated to English by a native English-speaking translator and compared with the original CLDEQ-8 version to confirm there were no meaningful differences. To clinically validate the new instrument, a prospective study was conducted to apply the new Spanish CLDEQ-8 to 50 contact lens users. RESULTS: Fifty patients were studied with an average age of 21.50 {\textpm} 1.66 years. The average CLDEQ-8 score was 13.28 {\textpm} 6.81 points (range 1-31). The internal consistency (Cronbach{\textquoteright}s alpha) was 0.89, with a corrected index of homogeneity \&gt;0.50 for all evaluated items. CONCLUSIONS: The process of trans-cultural adaptation of the questionnaire CLDEQ-8 resulted in the elaboration of a reliable and much needed instrument capable of measuring frequency and intensity of dry eye symptoms in Spanish-speaking contact lens users.},
	issn = {1476-5411},
	doi = {10.1016/j.clae.2018.10.015},
	author = {Garza-Leon, Manuel and Amparo, Francisco and Ort{\'\i}z, Gabriela and de la Parra-Colin, Paola and Sanchez-Huerta, Valeria and Beltran, Francisco and Hernandez-Quintela, Everardo}
}
