Sorry but I have to get Artsy to take over for today. I hope you find this article on vision and artists very interesting. I did.
https://www.artsy.net/article/artsy-editorial-artists-fight-vision-loss-continue-new-work?utmmedium=email&utmsource=13826723-newsletter-editorial-daily-07-10-18&utmcampaign=editorial&utmcontent=st-A