Topical insulin is a promising and effective (adjuvant) treatment for neurotrophic keratopathy. It facilitates the healing of neurotrophic epithelial defects and offers many advantages over the current treatment options; insulin is widely available and it is relatively inexpensive. Topical insulin drops do not affect systemic blood glucose levels and are well tolerated. However, further investigation is needed.
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Wouters et al. (2024) studied this question.