Use "crystalline lens" in a sentence

1. In principle, this is carried out approximately in the same way as refocusing of the crystalline lens of your eyes after reading a book to make a thorough examination of something at a long distance

2. " It is a significant fact that even in man, according to the high authority of Virchow, the beautiful crystalline lens is formed in the embryo by an accumulation of epidermic cells, lying in a sack-like fold of the skin; and the vitreous body is formed from embryonic subcutaneous tissue

3. The crystalline lens in the higher cuttle-fish consists of two parts, placed one behind the other like two lenses, both having a very different structure and disposition to what occurs in the vertebrata

4. Virchow, on the structure of the crystalline lens