| direct contact | 0.34 |
| perceive | 0.43 |
| share same basic anatom… | 0.41 |
| absorb light | 0.38 |
| see red | 0.34 |
| see blue | 0.34 |
| see green | 0.30 |
| perceive color | 0.30 |
| give the sense of sight | 0.30 |
| follow line | 0.25 |
| do poor job | 0.16 |
| blind spot | 0.41 |
| anterior chamber | 0.25 |
| about 125 million rods | 0.25 |
| sensitive | 0.68 |
| complex | 0.38 |
| amazing | 0.37 |
| less sensitive | 0.34 |