Analysis of the didactic activities implemented to teach english to students with a visual impairment related condition, with the purpose of implementing a virtual setting using effective activities : case study in four public high schools from Esparza, Naranjo, Pococí and Puntarenas - Víctor Garro, Heylin 1986- (Seminario de graduación (licenciatura en la enseñanza del inglés)–Universidad de Costa Rica. Sede de Occidente, 2016, 2016)