“…A number of alternative cell carriers including human- and animal-derived collagen [63–65], fibrin [10, 11, 13, 24], contact lenses [22, 66], human anterior lens capsules [67], and silk fibroin [68, 69] have been proposed to overcome disadvantages associated with HAM use such as disease transmission, variable tissue quality, and limited transparency. However, these alternatives also have their own drawbacks.…”