a. Plastic Polarizing Glasses
b. Paper Polarizing Glasses
a. Adhesive Polarizing Filters
b. Paper Polarizing Filters
iPhone & iPod
a. Aluminums Slide-On filters
Parity Challenge Neutral Density Filter
Fits over Polarizing Glasses as a clip-on lens
Single lens (+2.5 D) that attaches to frames with magnets, flips left and right. Used for Presbyopes and to disover the myope at when testing at near.
Paper, side view
Paper housing, iPads and iPhones, all sizes
Adhesive back that sticks to the screen, best for an iPad designated to DiagnosticGame app testing.