Lens sections were viewed on a Zeiss laser scanning confocal microscope model LSM 410 equipped with an Axiovert 100 inverted microscope, an Argon-Krypton 488/568/647 laser, a KP line selection filter, a FT 488/568 Dichroic beam splitter, a FT 560 Dichroic beam splitter, a LP 590 emission filter for viewing DiI, a BP 515–540 emission filter for viewing SYTOX green, and the software package LSM 3.993.