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.
Determining the Problem. 1  1. Observe for eyestrain. Think of how much time you spend staring at a screen everyday. 2  2. Know whether you have an infection. It's possible that your eye pain is due to an infection, such as conjunctivitis, known more commonly as pink eye. 3  3. Determine whether you have allergies.