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.
The following basic vision tests help to assess how well your eyes are functioning and to detect potential vision disorders. They are ordinarily included as part of a full eye examination. Techniques vary depending on whether you are a new or returning patient to the eye practitioner. Visual acuity tests help to evaluate your ability to distinguish the form and detail of an object or printed figure.