The entire Gulden occluder family is molded from strong, lightweight ABS plastic, with an easy cleaning gloss finish. Occluders are used to cover one eye during testing or treatment. Occluders are cupped to a 70mm radius. This occluder is 25cm long. Pinholes are 1.3 mm in diameter.
Check out Gulden's entire occluder line by navigating to "Products" → "Occluders"
The pinhole occluder restricts light to the center of the patient's lens. This way, refractive errors due to a misshapen lens are eliminated and it is possible to determine whether the patient would benefit from corrective lenses.