Lens

晶狀體 /晶状体

jīngzhuàngtǐ

(anatomy: transparent crystalline structure in the eye)

水晶體 /水晶体

shuǐjīngtǐ

(anatomy: transparent crystalline structure in the eye)

透鏡 /透镜

tòujìng

(object focusing or defocusing the light passing through it)

鏡片 /镜片

jìngpiàn

(object focusing or defocusing the light passing through it)

鏡頭 /镜头

jìngtóu

(object focusing or defocusing the light passing through it)