Red Maddox and Black Occluder

Red Maddox Lens with Black Occluder is a handheld ophthalmic and optometric diagnostic instrument used in binocular vision assessment and ocular muscle balance testing. The red Maddox lens contains multiple cylindrical grooves that convert a point light source into a red line or streak. When the patient views a penlight or fixation light through the Maddox lens, the position of the red line in relation to the light helps the clinician assess horizontal, vertical, or torsional deviations. The attached black occluder provides complete light blockage for one eye when required during cover testing, refraction support, or monocular examination. This combination makes the instrument useful in routine eye clinics, orthoptic evaluation, diplopia assessment, strabismus screening, and binocular vision testing. The product is typically made from optical-grade red acrylic or glass Maddox lens material mounted in a durable black plastic or ABS occluder frame. The smooth, lightweight, handheld design allows easy clinical handling and supports cleaning or disinfection between patients.