kính áp tròng

kính (“glass”) +‎ áp (“to tightly rest on or make direct contact with”) +‎ tròng (“lens; iris”), perhaps literally meaning either "glasses with lenses making direct contact with the eyeballs" or "glasses making direct contact with the iris".

• (Hà Nội) IPA^(key): [kïŋ˧˦ ʔaːp̚˧˦ t͡ɕawŋ͡m˨˩]
• (Huế) IPA^(key): [kɨn˦˧˥ ʔaːp̚˦˧˥ ʈawŋ͡m˦˩] ~ [kɨn˦˧˥ ʔaːp̚˦˧˥ ʈɔŋ˦˩]
• (Hồ Chí Minh City) IPA^(key): [kɨn˦˥ ʔaːp̚˦˥ ʈawŋ͡m˨˩]

(classifier tấm, miếng) kính áp tròng

1. a contact lens

• thấu kính