Development of an eye tracking medical headlamp.

This study investigates a medical headlamp which is designed to adjust LED light automatically on the X axis and Y axis plane as determined a surgeon during a surgery. The needs of surgeons are determined through a CMOS camera which detects the movement of the eye. The system is composed of a mechanical actuator and an electrical control center. The LED lamp actuator (50×24×21 mm(3)) was designed to be as small as possible. The actuator can be easily attached onto typical goggles and incurs no burden during long-term use due to its light weight of 40g. To determine the movement of the eye, a limited embedded CPU was designed while considering memory, the process speed, simplicity and accuracy. The designed system was tested by exercises such as moving the eye in a zigzag direction and in random up, down, left, and right directions with adjustments for different lightings. Each was tested 100 times (total 1500), showing satisfactory results with 98.72% accuracy.