Topical Insulin for Neurotrophic Keratopathy and Persistent Corneal Defects
A recent retrospective study published in Cornea highlights topical insulin as an effective off-board intervention for difficult-to-heal corneal defects. How It Works: Topical insulin binds to insulin and IGF-1 receptors on the cornea, triggering signaling pathways that accelerate epithelial cell migration to close wounds. Key Findings: Researchers evaluated 57 eyes treated with 1 IU/mL of topical insulin four times daily. Neurotrophic Keratopathy (NK): Achieved the highest success rate at 83.9% . Among eyes with persistent epithelial defects, 71.4% achieved complete closure in an average of five weeks. Visual Acuity & Symptoms: 42.9% of NK patients gained at least one line on the Snellen chart, alongside notable improvements in pain, irritation, and photophobia. Condition Variance: Results varied significantly across other surface diseases, showing a 44.4% success rate for dry eye disease (DED) and only 14.3% for graft-versus-host disease (GVHD). Safety: The trea...