I Am A 47 Yr Olf Female And For A

I am a 47 yr olf female and for a while ive been noticing vision distortions , glowing/flashing tubes or shapes in my vision and i would think maybe low sugar or something and drink a soda and wait for it to pass but was with mother at onset of last episode and before i could get a sentence out about it to her she asked why my right eye was so extremely dilated which gave me a symtom i was unaware of Why it could be happening . its meaning ,and urgency to see a doc