iii-3
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3.7 Utilities ................................................................................................................... 3-90
3.7.1 Buttons and icons on the screen ................................................................... 3-91
3.7.2 Operations for each setting............................................................................ 3-95
4. TECHNICAL INFORMATION ................................................................................ 4-1
4.1 IOL power calculation formula ................................................................................. 4-1
4.1.1 SRK-II formula ................................................................................................. 4-1
4.1.2 SRK/T formula ................................................................................................. 4-2
4.1.3 HOLLADAY formula ......................................................................................... 4-4
4.1.4 Hoffer Q formula .............................................................................................. 4-6
4.1.5 HAIGIS standard formula ................................................................................. 4-7
4.2 How to calculate axial length using the axial length measurement function .......... 4-9
4.2.1 Phakic eye ....................................................................................................... 4-9
4.2.2 Dense cataract eye .......................................................................................... 4-9
4.2.3 Aphakic eye ..................................................................................................... 4-9
4.2.4 IOL eye ........................................................................................................... 4-10
4.3 Amplifier characteristics of the A-scan diagnosis ................................................. 4-11
4.4 Checking the software version .............................................................................. 4-11
4.5 Ultrasound wave output ........................................................................................ 4-12
4.5.1 MI (mechanical index) .................................................................................... 4-12
4.5.2 TIS (thermal index of soft tissue) ................................................................... 4-12
5. INSPECTION AND MAINTENANCE ..................................................................... 5-1
5.1 Warranty .................................................................................................................. 5-1
5.2 Durable years .......................................................................................................... 5-2
5.3 Inspection ................................................................................................................ 5-2
5.4 Routine maintenance .............................................................................................. 5-2
5.4.1 Maintenance of measurement probes ............................................................. 5-3
5.4.2 Cleaning and Disinfection of measurement probes (for Europe) .................... 5-6
5.4.3 Maintenance of main unit ................................................................................. 5-8
5.5 Replacing consumables .......................................................................................... 5-9
5.6 Storing ..................................................................................................................... 5-9
5.7 Disposal ................................................................................................................. 5-10
6. TROUBLESHOOTING .......................................................................................... 6-1
7. SPARE PARTS AND OPTIONAL PARTS .............................................................. 7-1
7.1 Spare parts .............................................................................................................. 7-1
7.2 Optional parts .......................................................................................................... 7-1
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