Our clinic sees the occasional low-vision patient. We had one recently where my doctor wanted to see what getting a set of Corning Orange #508 lenses would run. Our normal go-to for that (evidently) no longer stocked them. We called our lab, who CAN do it, but needs to know the percentage orange we're looking for. Low vision in general is pretty far outside my wheelhouse, and my google-fu is not returning anything helpful. Anyone happen to know the orange density in that lens?