瓦-L8

NH-L8 Digital PD Meter Features: Adopting cornea reflection light coincidence method Operate by aligning luminous points on the pupils with the measuring line.By 3 measuring ways: right, right +left, and left. Digitally displayed Measuring accuracy: within 0.25mm Measurements can be made for one single eye or both eyes Possible to measure PD of focusing point distances range from 30cm to infinity Automatically switches OFF one minute after operation is completed so as to save the energy Distances from tops of cornea to lenses or frames can also be measured.Technical specifications: Measurement method: Cornea reflection light coincidence method Measurement range: 48-77mm ( both eyes) 50-80mm ( both eyes) 24-38.5mm ( single eye) 25-40mm ( single eye ) 3. Resolution: 0.5mm 4. Display method: LCD digital 5. Target for focusing point: Internal green dot on illuminated background 6. Range of focusing point: 30cm to infinity 7. Power supply: 4.5V DC, R07 batteries x 3