RT Journal Article T1 The Influence of COVID-19 Isolation on Physical Activity Habits and Its Relationship with Convergence Insufficiency A1 Mon López, Daniel A1 Bernárdez Vilaboa, Ricardo A1 Álvarez Fernández-Balbuena, Antonio A1 Sillero Quintana, Manuel AB The purpose of this work is to evaluate the effects of confinement due to COVID-19 isolation on visual function, considering insufficient convergence as one of the possible effects of living the whole day in a reduced space. We pass a Convergence Insufficiency Symptom Survey (CISS) among 235 people to detect their habits before and after 25 confinement days. The data collection protocol consisted on a Google forms questionnaire included two parts: the first with current data (isolation period) and a second with pre-isolation period data. Differences between the pre-isolation and isolation period were calculated using the related paired T-tests. When statistically significant differences were found, the effect size was estimated using the Cohen’s d index (d). The reduction in physical activity levels during confinement were related to the increase in total number of minutes of screen consumption from 433.49 min to 623.97 min per day (d = 0.67; 44.01%). The CISS scores were increased by more than 43% during confinement. The increase in convergence insufficiency was 100% after the studied isolation period of 25 days. The 92.19% increase in television use during 25 days of confinement is not responsible for the increase in convergence insufficiency. However, due to the increase in the use of PCs in this period, there is a notable increase in convergence insufficiency. Therefore, we can conclude that not all increases in tasks with electronic devices are responsible for the increase in convergence insufficiency. PB MDPI SN 1660-4601 YR 2020 FD 2020 LK https://hdl.handle.net/20.500.14352/91903 UL https://hdl.handle.net/20.500.14352/91903 LA eng NO Mon-López D, Bernardez-Vilaboa R, Fernandez-Balbuena AA, Sillero-Quintana M. The Influence of COVID-19 Isolation on Physical Activity Habits and Its Relationship with Convergence Insufficiency. International Journal of Environmental Research and Public Health. 2020; 17(20):7406. https://doi.org/10.3390/ijerph17207406 DS Docta Complutense RD 24 abr 2026