| become thinner | 0.52 |
| refract light | 0.45 |
| bend light rays | 0.41 |
| become opaque | 0.28 |
| cover the front of the … | 0.25 |
| create clear image of t… | 0.25 |
| become weak | 0.16 |
| much curvature | 0.39 |
| astigmatism | 0.35 |
| two curves | 0.29 |
| curved | 0.77 |
| shaped like football | 0.67 |
| distorted | 0.46 |
| shaped like the back of… | 0.41 |
| reshaped | 0.37 |