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.
Order your free copy Â». Early detection, through regular and complete eye exams, is the key to protecting your vision from damage caused by glaucoma. A complete eye exam includes five common tests to detect glaucoma. It is important to have your eyes examined regularly.Your eyes should be tested: 1  before age 40, every two to four years. 2  from age 40 to age 54, every one to three years. 3  from age 55 to 64, every one to two years. complete eye exam includes five common tests to detect glaucoma. It is important to have your eyes examined regularly. Your eyes should be tested: 1  before age 40, every two to four years.