COA Ophthalmic Technician Practice Exam 2026 – Complete Test Prep

The medial canthus and lateral canthus refer to the junctions of the eyelids at each corner of the eye. The medial canthus is located at the inner corner, where the upper and lower eyelids meet toward the nose, while the lateral canthus is found at the outer corner, where the eyelids meet toward the ear. Understanding the structure and function of these junctions is important in ophthalmology, as they play a role in eyelid movement and function, and can also be involved in various pathologies related to the eyelids and tear drainage.

These anatomical landmarks are crucial for procedures involving eyelid surgery, assessments of eyelid conditions, and interpreting symptoms related to the eyes. Familiarity with such terminologies not only aids in clinical practice but also enhances effective communication in the medical field.