| 凹 |
āo tòu jìng | concave lens |
| 凹 |
āo | concave; depressed; sunken; indented; female (connector etc) |
| 凹 |
wā | variant of 洼 / (used in names) |
| 透 |
tòu | (bound form) to penetrate; to seep through / to tell secretly; to leak / thoroughly; through and through / to appear; to show |
| 透 |
tòu jìng | lens (optics) |
| 镜 |
jìng | mirror / lens |