If you have an older, drafty house, it can be kind of hard to keep temperature even and comfortable from room to room. We get a lot of inquiries here at Birdtricks about how cold is too cold for our parrots. The concerns generally stem from the knowledge that many parrot species originate from warm climates.
Astigmatism in only one eye may cause lazy eye (amblyopia) if present from birth. The affected eye does not 'learn' how to see because the brain ignores the signals it receives. Amblyopia can be treated with eye patching if diagnosed early enough, before the vision pathways in the brain are fully developed.
Astigmatism is a very common vision problem. In fact, most people have some. When you have astigmatism, light does not focus to a single point in your eye. Instead, it causes blurred vision because the front of the eye is shaped more like a football than a baseball. Unfortunately, astigmatism can (and often does) change throughout your life, usually for the worse with age.