Nidek Echoscan US-500 ultrasonic scanner

Description

A-scan biometry/IOL power calculation

• Probe Solid probe

• Frequency: 10MHz (± 20%)
• Internal fixation lamp: LED (Red), Illumination
  • Display Measurement method: Ultrasonic pulse reflective method A-scan biometry
• Measurement value: Axial length, anterior chamber depth, lens thickness, vitreous body thickness,
• and A-scan waveform (measurement values of 10 times, the average value, and the starndard
• deviation)
• Measurement range: 12.00 to 40.00mm
• Minimum display unit: 0.01mm
• Accuracy: ± 1 mm
  • Measurement function: Manual, Auto, Speed
• Gate: Cornea, Lens-F (anterior), Lens-B (posterior), retina
• Sonic velocity to calculate distance:
• Average axial length: 1550m/s (Phakic eye), 1548m/s (Eye with mature cataract: DENSE CAT ON)
• 1532m/s (Aphakic eye)
• Setting range: 1000 to 2000m/s
• Anterior chamber, vitreous body: 1532m/s
• Setting range: 1000 to 2000m/s (Anterior chamber)
• Setting range: 500 to 2000m/s (Vitreous body)
• Lens: 1641m/s, 1629m/s (Eye with mature cataract: DENSE CAT ON)
• Setting range: 1000 to 2000m/s
• IOL: 2060m/s (Acrylic)
• 2760m/s (PMMA)
• 1049m/s (Silicone)
• Setting range: 500 to 3000m/s
  • IOL power calculation IOL formula: Binkhorst, Holladay, SRK, SRK II, SRK/T, Hoffer Q
• Calculated IOL power: IOL refractive power for ametropia (IOL)
• Postoperative refractive error (ERROR)
• IOL data registration: Manufacturer, model, A-Constant, SF value, ACD value (A maximum of 16
• types of IOL data can be registered.)
• IOL power calculation range: A-Constant 100 to 130
• ACD value: 1.60 to 9.99
• SF value: 0.00 to 9.99
• Axial length: 12.00 to 40.00 mm
• Keratometry: 5.00 to 19.99 mm (curvature radius)
• 00 to 60.00D (refraction)
• Postoperative target refraction: -10.00 to +10.00D
• Calculated IOL power: -99.99 to +99.99D
• Comparison display: Three types of IOL power calculation results are displayed for a single IOL
• power calculation formula. The calculation results of estimated
• postoperative refractive power for the IOL power is displayed.
• IOL power calculation comparison: Three types of IOL power calculation results are displayed for
• multiple calculation method selected by the physician.