Flu & Covid-19 Vaccines

Hello, In 2014 I was given a flu vaccine, this caused me to go partially blind in 1 eye. To correct this my neurologist put me on high-dose steroids for a week and thankfully my eye sight returned. The Flu vaccine is supposed to be 100% safe, but caused a very stressful side effect with me. I am scared that the Covid-19 vaccine might do the same thing and I might not be so lucky. What should I do? Regards