Occluders are used to cover one eye during testing or treatment. Occluders are cupped to a 70mm radius. This occluder is 25cm long.
Maddox rods are used in conjunction with prisms measuring lateral and vertical phoria in both near and distant vision. The Maddox rod test can be performed in free space without use of the phoropter. The Double Maddox Rod has one lens parallel and one lens perpendicular to the handle.
Plastic is durable and easily cleaned.