Vergence Facility testing has been shown to be one of the most important methods of detecting patients with binocular vision disorders and symptoms. Diagnosis of non-strabismus binocular vision abnormalities can be improved through the use of vergence facility testing at near. All vergence facility stick prisms come with a 3.25 inch polycarbonate handle. The handle reduces the likelihood of damaging the prism surface during use.
Use only mild soap and water to clean prisms! Alcohol will degrade the quality of the product over time.
Gulden’s acrylic ophthalmic prisms have been re-engineered to solve the problem of birefringence which can hinder their use in certain clinical applications. Our exclusive manufacturing process greatly reduces optical strain, producing prisms that virtually eliminate clinical birefringent effects. Our prisms are calibrated for use in the frontal plane position.