Roca cape lighthouse in Portugal, West most point of Europe ( Cabo da Roca) Vertical. Roca cape lighthouse in Portugal, West most point of Europe ( Cabo da Roca) Vertical. The obelisk with a large white cross at Cabo da Roca. It is a cape which forms the westernmost extent of mainland Portugal and continental Europe.
[Read more about children's eye exams .]. 20/20 vision (or really, 20/20 visual acuity) is considered normal vision, meaning you can read at 20 feet a letter that most human beings should be able to read at 20 feet.
You can only read while your eyes are stopped. If you learn to make fewer movements per line, you'll read a lot faster. But be careful â research reveals limits to how much English readers can see at once: 1  You can read eight letters to the right of your eye position, but only four to the left.2  This is roughly two or three words at a time.ou can only read while your eyes are stopped. If you learn to make fewer movements per line, you'll read a lot faster. But be careful â research reveals limits to how much English readers can see at once: 1  You can read eight letters to the right of your eye position, but only four to the left.