Glaucoma - a disease that damages the optic nerve that sends pictures to the pain. if left untreated, it can lead to loss of peripheral vision.
The autonomic nervous system is the one that pertains to sympathetic vs parasympathetic. The autonomic nervous system has three divisions: the enteric nervous system, the sympathetic nervous system, and the parasympathetic nervous system.
Sympathetic is the nervous system responsible for your “fight or flight” responses in times of emergencies. It controls the body’s responses to stress, injuries, or perceived threats.
Parasympathetic is the nervous system responsible for your “rest and digest” responses in times of non-emergencies. It controls the body’s responses at rest and helps your body regulate its normal daily organ functions.
One way to remember how to distinguish between the two is to associate the beginning letters of the words with their corresponding attributes.
The sympathetic nervous system kicks in during times of stress, and the parasympathetic nervous system kicks in during times of peace.
Of course, there is much more to both nervous systems than that so let’s look a little bit closer at both.
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