Related Clues:
- One may be private or lazy
- Part of a symbol on a dollar bill
- Common observer
- Ophthalmologist's specialty
- It has a focused pupil
- Radial keratotomy target
- Stalk end, on a crab
- Study closely
- It has one pupil
- Cyclops' single feature
- Thing surrounded by cilia
- Magic ___ (book series with 3D designs)
- Severe-storm center
- Image on the back of a dollar bill
- Tropical cyclone center