Slightly off-topic but at first I was going to complain that someone who can see some light and shadow isn't "really" blind. But this is actually a good reminde

Slightly off-topic but at first I was going to complain that someone who can see some light and shadow isn't "really" blind. But this is actually a good reminder that impairments aren't always binary. He was blind for all intents and purposes, even if he can see some brightness contrasts some of the time. This is especially important to remember when dealing with accessibility: even if it may not be possible to offer 100% of the experience to everyone, making things a bit more accessible can still be a huge win already. Not to mention that some forms of disability can be situational. There is little practical difference whether you can for example only use one hand because you only have one arm, because one of your arms is broken and bandaged, or because you're carrying your groceries.