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.
Eye charts can have non-standard configurations, but generally speaking, if you can only read the largest letter (the usual âEâ), you have 20/200 vision. That means you can read a letter at 20 feet that the average person can read at 200 feet. A person with 20/200 vision has poor visual acuity.