my eye doctor warned me of this and told me to call right away if this happens. but i'm not pg. she said because i have a strong prescription i am at higher risk of retinal detachment and that can be a symptom. i'm surprised that more mamas aren't concerned with the implications of vision and blood pressure in pregnancy. i would call my doctor.
This. Since this is a new thing and you are later in pregnancy, I would make an appt to have my blood pressure checked and have my urine screened for protein. The vision change plus the headache might be blood pressure related and a pre-e indicator. It would be one thing if this was normal for you and migraines were typical, but its easy enough to have your blood pressure checked and at least rule that out.