how long does it take to become blind by looking at the sun ???????????????

Question: how long does it take to become blind by looking at the sun ???????????????
- Keywords:
  light,
  safety,
  solar
Asked by cactus lover to Ryan, Claire on 25 Jun 2015.
- Ryan Cheale answered on 25 Jun 2015:
  
  I don’t think anybody has tested this aha but i can’t imagine it would take long, the sun is immensly powerful and you’d burn your retinas very quickly! Please don’t try this!

Question: how long does it take to become blind by looking at the sun ???????????????