Meaning of Japanese Word "凹レンズ" (Orenzu)

Kanji in this word

Related words "凹"

• 凹凸 (ototsu)unevenness, irregularity, ruggedness
• 凸凹 (dekoboko)unevenness
• 凹む (hekomu)cave in, sink, collapse
• 凹レンズ (orenzu)concave lens