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.
The other rows contain letters that are progressively smaller. During an eye exam, your eye doctor will ask you to find the smallest line of text letters that you can make out, and ask you to read it. If you can read the bottom row of letters, your visual acuity is very good.
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.