I once had a high fever and got up from bed and began walking. i noticed the sparkles you get from getting up too quick, but it immediately progressed into black until i was completely blind in both eyes for about 5 minutes but no loc. causes?

Dehydration: Drink fluids, use Tylenol to control fever, and please discuss COVID 19 screening. If you continue to have fever and vision changes, you must see the urgent care/Emergency department for an evaluation. Watch for respiratory difficulty, vomiting and headache. Other causes include pneumonia, sepsis or influenza, an evaluation is indicated.