Iceea, they are prescription, which I find this sudden eye strain so weird. I went to the optometrist a few months ago and was told I had almost perfect vision (except for the needing the reading glasses, which even then there was no blurriness or anything, just eye strain and headaches), which even the optometrist said was weird because both of my parents need glasses. So even though I went somewhat recently I guess I'll have to go back because the headaches are slowly getting worse.