Background: The aim of this study is to report a patient with senile cataract developing severe thermal corneoscleral injury during phacoemulsification. which was treated with a donor scleral graft. Case: Severe thermal corneoscleral injury occurred during phacoemulsification in the right eye of a 74-year-old male. His medical history was prostate hypertrophy. https://www.roneverhart.com/2-1-2-x-1-4-x-36-Smooth-Saddle-Threshold-NGP-410-36/