China Cheap Ophthalmic Handheld Automatic Refractometer, Find details about China Refractometer, Hand-Held Refractometer from Cheap Ophthalmic Handheld Automatic Refractometer
SPECIFICATIONS ABOUT THIS HANDHELD VISION SCREEN | |||
Sphere range | -12.0D ~ +12.0D | Axis of astigmatism range | 1° ~ 180° |
Sphere tolerence | ±0.5D | Data acquisition time | 1s/eye |
Cylinder range | -5.0D ~ +5.0D | External | Connect to IPAD or PC |
Cylinder tolerence | ±0.5D | Net weight | 360g |