It's combination of FYZ24B and FYZ-12. We only need to change the head part to switch from ophthalmoscope to streak retinoscope.

FYZ12
Specifications:
Illumination Form  Big Spot, Small Spot, Slit, Net, Red Free
Diameter of Filter  0.2mm-0.4mm
Illumination Brightness  ≥ 80lx
Diopter Compensation  -35D~+20D, 24 in total
Illumination Source  3.5V/2.8W, Halogen Bulb
Power Supply  AC220V/ 50Hz\AC110V / 60Hz
 or 2# Alkalescent Battery

FYZ24B
Specifications:
Working Distance  1m
Adjustable Range of Streak  0.2mm-0.4mm
Streak Rotation  360°
Illumination Source  3V/2.1W, Incandescent Bulb
Power Supply  AC220V/ 50Hz\AC110V / 60Hz