Daylighting and the Elderly: A Study of Daylight Accessibility and Envelope Retrofit in Southern Chile's Senior Home Catalina Alarcón 1 , Milena Pincheira 1 , M Isabel Rivera 1,2 , Andrea Martínez 1 1 Universidad de Concepción, Chile 2 Investigadora, Centro de Desarrollo Urbano Sustentable, CEDEUS, Chile caalarcon2017@udec.cl mipincheira2017@udec.cl mariaisrivera@udec.cl amartineza@udec.cl Abstract. In the next 25 years, the elderly population will increase on average to 65 thousand people annually in Chile (INE, 2018). Their independent living is jeopardized partially for diminished visual capacity that difficult spatial perception. Although light does not correct vision impairment, adequate light levels can respond to the needs of older people as preventing visual errors. This study evaluates daylighting availability in an assisting living residence in a southern city in Chile. A quantitative approach resulted in the identification of envelope-retrofit strategies that allow achieving recommended levels of natural lighting, particularly in shared spaces where residents spend most of the day. The results show that it would be possible to achieve better light availability, as it also allows for a better understanding of the contributions of the building envelope. Finally, the study outlines recommendations for future retrofits that meet requirements for visual comfort for a growing senior population. Keywords: Daylighting Accessibility, Senior Home, Daylighting Strategies, Visual Comfort, Computational Simulation. 1 Introducción A medida que transcurren los años, a las personas de edad avanzada se les dificulta una vida independiente, al perder parte de su capacidad funcional. Se van presentando limitaciones, problemas físicos y/o mentales, necesitando alguna forma de asistencia a largo plazo para la vida cotidiana, estadía en 1333 SIGraDi 2021 | Designing Possibilities | Ubiquitous Conference