An example of lack of lens regeneration in zebrafish embryo. Lentectomy was performed at Long Pec Stage (48 hpf). Only the lens from the right eye was removed. The lens on the left eye was not touched. There is no sign of lens regeneration or crystallin synthesis (green) in the lentectomized eye when the animal was examined three days after lentectomy. Note that there was no severe trauma in the lentectomized eye.