... : [O]-Open aperture (two positions) [R]-Retinoscopic lens, +1.50D [P]-Polarizing lens, (45° Left eye, 135° Right eye) [WMV]or ... (Dissociating prisms) [± . 50]-± 0.50 fixed cross cyliner [OC]- Occluder P. D. Adjustment: 48-75mm, 1mm steps Standard Accessory: One near point ...