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Presented by: Ray T. Oyakawa, M.D.

Comparison of PalmScan and IOL Master axial lengths measurements. Presented by: Ray T. Oyakawa, M.D. Sharper Vision Centers. A MEDICAL GROUP. ASCRS Chicago 2008. No financial interests. Study Design. Prospective study for axial length measurement comparison between PalmScan & IOL Master.

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Presented by: Ray T. Oyakawa, M.D.

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  1. Comparison of PalmScan and IOL Master axial lengths measurements Presented by: Ray T. Oyakawa, M.D. Sharper Vision Centers A MEDICAL GROUP ASCRS Chicago 2008 No financial interests

  2. Study Design • Prospective study for axial length measurement comparison between PalmScan & IOL Master. • 74 consecutive eyes of patients for presbyopia correcting IOLs between January 19, 2007 & October 17, 2007. • Three eyes were eliminated-could not be measured with IOL Master V 3.02 software & 5.02 software. One eye was successfully measured with V. 5.02 when it could not be measured with V 3.02. 47 eyes were done with V 3.02 software and 24 eyes with V 5.02 software.

  3. Patient characteristics • 36 pts., one unilateral • Average age 68.8, range 50 to 84 • 38 female eyes, 33 male eyes • 4 Refractive Lens Exchanges • 67 for presbyopia correcting IOL

  4. Technique • IOL Master measurements were taken by two experienced technicians. • All immersion measurements were taken by the author with the patient in a supine position using the Micro Medical PalmScan handheld A-scan.

  5. Eye characteristics • 35 right eyes 36 left eyes • Range 21.38 mm to 28.91 mm • One psuedophakic eye, 8 post LASIK eyes-3 also post PPV • One post PPV w/buckle

  6. Results • Range of axial lengths 21.38 mm to 28.91 mm-IOL Master • Average axial length 24.53 mm –standard deviation 1.82 mm-IOL Master • Average difference in axial length between the PalmScan and IOL Master • 0.022 mm with standard deviation of 0.10 mm and R coef. of 0.998 • 4.1 % of eyes could not be measured with the IOL Master version 5.02 software.

  7. Results Correlation Coefficient = 0.998

  8. Conclusion • Axial length measurements by the PalmScan immersion ultrasound is comparable to the IOL Master and can be used when the IOL Master can not get an axial length measurement. • Immersion was needed in 4.1% (3/74). • Immersion units are still need even if you have an IOL Master.

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