Ophthalmology Diagnostic Set
Ophthalmoscope: 
Illumination: large light spot 3.2mm, small light spot 1.6mm, slit, central-net, Redfree filter. 
 Diopter compensation:0/ plus-minus1D/ plus-minus2D/ plus-minus3D/ plus-minus4D/ plus-minus5D/ plus-minus6D/ plus-minus8D/ plus-minus10D/ plus-minus12D/ plus-minus16D/ plus-minus20D/-25D
Retinoscope:
Working Distance: 89-100cm
Strip Width: 3-20mm
Rotation Angle: 360 Degree
Illumiation source: 3v/2.1w halogen bulb