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.
A comprehensive eye exam will usually last up to an hour. During this time your optometrist will painlessly check and evaluate every component of your vision. The first test is typically that of visual acuity, which is a measurement of how well you see. comprehensive eye exam will usually last up to an hour. During this time your optometrist will painlessly check and evaluate every component of your vision. The first test is typically that of visual acuity, which is a measurement of how well you see.