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“O”：Open aperture
“R”：Retinoscope lens
“R”：Retinoscope lens
“R”：Retinoscope lens
＊Lens of +1.50m-1 ，It is suit for the distance of 67 centimeters
“P”：Polaroid
＊ it is used for examining the dioptric balance of eyes , Implicit strabismus and stereo vision
“RMV”：Red Vertical maddox
＊Be used to examine Implicit strabismus
“RMH”：Red horizontal maddox
＊Be used to examine Implicit strabismus
“WMV”：Plane Vertical Maddox
＊Be used to examine Implicit strabismus
“WMH”：Plane horizontal maddox
＊Be used to examine Implicit strabismus
“RL”：Red lens
＊Be used to examine eye function, Blending function and Implicit strabismus
“GL”：Green lens
＊Be used to examine eye function, Blending function and Implicit strabismus
“+”：Test mark of optical center adjustment
“+.12”：Dioptric of the Spherical Lens is +0.12m-1
＊Be used for the semi-adjustment of sphere lens, 0.25m-1
“PH”：1mmPinhole lens
＊Be used to exclude visual non-refractive errors of the tested eye
“6△U”：6△Bottom-up prism
＊Be used to examine the rotating prism with the detection of nearly horizontal squint
“10△I”：10△Bottom-up prism
＊Be used to examine the rotating prism with the detection of nearly horizontal squint
“±0.50”：Cross-cylindrical lens
＊Be used to examine the corrected dioptric of the Presbyopia and spherical lens
“OC”：Black lens
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