Horizontal & Vertical Prism Bars Set

Horizontal & Vertical  Prism Bars are available with 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 25, 30, 35, 40, 45 Diopter coverage with all on the bar (none are loose). Values are marked on the bars. Prism Bars provide an efficient means for treating cases of diplopia, symptomatic heterophorias and abnormal head postures.  

 

Luneuae ophthalmic prism bars were recently re-engineered to solve the problem of birefringence which can hinder their use in certain clinical applications. This prism bar manufacturing process greatly reduces optical strain, producing prisms that virtually eliminate clinical birefringent effects.

 

Prism can be very useful when treating patients with symptomatic binocular vision disorders, but opinions vary widely about how to best determine the amount to prescribe. Indeed, common methods for determining prismatic prescriptions can result in different magnitudes of recommended prism for the same patient. This lack of consensus, along with rough guidelines and apparently contradictory rules of thumb, may make some clinicians uncomfortable prescribing prism and may even deter them for doing so.

 

Some report that Prisms tend to be more effective for patients with divergence insufficiency, basic esophoria, and vertical heterophoria than for convergence insufficiency, basic exophoria, divergence excess and convergence excess.