Comparison of Palm Scan and IOL Master axial
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Comparison of Palm. Scan 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 n Prospective study for axial length measurement comparison between Palm. Scan & 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.
Patient characteristics 36 pts. , one unilateral n Average 68. 8, range 50 to 84 n 38 female eyes, 33 male eyes n 4 Refractive Lens Exchanges n 67 for presbyopia correcting IOL n
Technique n IOL Master measurements were taken by two experienced technicians. n All immersion measurements were taken by the author with the patient in a supine position using the Micro Medical Palm. Scan handheld A-scan.
Eye characteristics 35 right eyes 36 left eyes n Range 21. 38 mm to 28. 91 mm n One psuedophakic eye, 8 post LASIK eyes-3 also post PPV n One post PPV w/buckle n
Results n n n 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 Palm. Scan and IOL Master n 0. 022 mm with standard deviation of 0. 10 mm and R coef. of 0. 998 n 4. 1 % of eyes could not be measured with the IOL Master version 5. 02 software.
Results Correlation Coefficient = 0. 998
Conclusion n Axial length measurements by the Palm. Scan immersion ultrasound is comparable to the IOL Master and can be used when the IOL Master can not get an axial length measurement. n Immersion n was needed in 4. 1% (3/74). Immersion units are still need even if you have an IOL Master.
