The Stellmacher Henderson Alignment-Marker is an educational-purpose ophthalmic training instrument designed for demonstrating alignment concepts at the slit-lamp. It supports instructors, students, and technicians as they learn how reference points are evaluated and established in various ophthalmic assessment and alignment exercises. Its structured marking surface is intended for teaching the principles behind consistent alignment practices. Constructed from high-quality stainless steel, the instrument maintains durability and dimensional accuracy during ongoing classroom, laboratory, or workshop sessions. Its balanced 13 cm handle provides stable grip control, allowing learners to practice steady positioning, controlled movements, and proper instrument handling techniques. Stellmacher Instruments Inc. develops tools that assist with education, skills development, and technical understanding across ophthalmic training environments. The Henderson Alignment Marker reflects this commitment by offering a reliable, precision-built instrument specifically suited for demonstration, instruction, and non-clinical alignment training.