I purchased two new pairs of glasses several days ago (prescription- 1 reading pair and 1 distance pair) They have certainly improved my vision but I woke at 1 am this morning, sat up and almost passed out with dizziness.
Attempted to sit up twice and this happened, was ok once I stood up. Have been feeling slightly dizzy and nauseous all day, and wonder if the new glasses would be causing this problem.

Feel fine in all other respects but was very scary at the time, and still feel yuck!!