[canes123456]

The vast majority of visually impaired and legally blind have some degree of sight or at least light perception. The tiny percentage that does not still needs/like sunlight for vitamin D etc, but you don't get much sunlight form a window.

[Someone]

For those wondering: you can get lots of sunlight, but not any UVB (https://www.ncbi.nlm.nih.gov/pubmed/19614895: "All glasses totally blocked UVB radiation."), and that's what your body needs to make vitamin D (https://www.vitamindcouncil.org/about-vitamin-d/how-do-i-get...)