What's it called when you have seen something through an eyepiece?
Options:
- sights
- optical illusion
- optical telescope
- light microscope
- binocular
Let's think now! Step-by-step reasoning:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Sights are something that can be seen from an eyepiece.
So, the final answer is sights.