1. 晶状体核：lens mount adapter == 透镜接头 | lens nucleus == 晶状体核 | lens of extreme aperture == 最大相对孔径物镜,临界孔径物镜

2. 晶体核：晶体脱位 lens luxation | 晶体核 lens nucleus | 晶体基板 lens placode

noun

1. the central structure of the lens that is surrounded by the cortex

Synonym: nucleus