Vision Chart GD8020
Tumbling E, Green/Red, Cyl axis Testing distance: 5M LED lighting
LED Vision Chart GD8021
GD8021 Vision chart offers different optotype for options Testing distance: 5M GD8021C:C chart GD8021E: E chart GD8021A: Alphbet chart GD8021K: Kids chart
LED vision chart for naked eye test optometry GD8022
Testing distance: 2.5M LED lighting 30x60cm size