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 common eye problem causing blurry vision, difficulty seeing details and eye strain headaches. Ocular migraine usually refers to a type of migraine that can cause temporary blindness in one eye. Retinal detachment causes floaters in your vision, flashes of light, blind spots, loss of vision, and more. A stroke occurs when blood and oxygen to the brain are cut off, and causes numbness, confusion, and more.