The set consists of: BPI UV Diamond Dye 400nm, BPI 450nm, BPI 50% Omega, BPI Signal Green, BPI Signa..
A set of 12 lorgnettes to aid with further research into dyslexia.Set consists of: BPI 450nm, BPI Om..
A small handlheld device that can be used for checking the stresses imposed on lenses by frames...
A quick test to demonstrate refractive problems. If a patient can see more clearly through the multi..
A quick test to demonstrate refractive problems. If a patient can see
more clearly through the mul..
The BPI® Blue Light Filter Vision Tester
is a hand-held, battery-operated blue/violet light source..
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