A scotoma is when a small part of the visual field has slightly worse visual acuity - a bit like having a blurry spot on an otherwise normal computer monitor.
Everything in my visual field seemed pleasantly italicised, filmic, and I wondered if all these people with their cardboard-sleeve-swaddled cups had any idea what a powerful drug they were sipping.
Our eyes are designed in a way that only lets us see a tiny portion of our visual field with the precision necessary to recognise letters in a 10 to 12 point font, which is what you'll find in most printed books.