far point

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The farthest point at which an object can be seen distinctly by the eye.

from The Century Dictionary.

• noun See point.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The most distant point at which the eye can focus (usually infinity, but nearer for a myopic eye).
• noun The most distant point under consideration in any situation.