Many: It can be from certain medical conditions like poor blood flow to where the optric nerves cross, temporal arteritis(rare to be bilateral), low blood sugar, or very commonly hysteria.
Answered 12/20/2016
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6 doctors weighed in across 3 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
7 doctors weighed in across 2 answers
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