Appendix System Parameters
APPENDIX C
HAIGIS IOL FORMULA
The Haigis IOL formula developed by Wolfgang Haigis, Ph.D. may be ordered as an option on the
P
ACSCAN™ 300AP and PACSCAN™ 300A systems. For a clinical reference regarding the Haigis IOL
formula consult “Comparison of immersion ultrasound biometry and partial coherence interferometry for
IOL calculation according to Haigis”; Haigis, W, Lege, B, Miller, N and Schneider, B;
Graefes Arch Clin
Exp Ophthalmol (2000) 238:765-773. Another source for information regarding the Haigis IOL formula
can be found on the Internet at http://www.doctor-hill.com/haigis.htm. This website was created by
Warren E. Hill, M.D.
Two different types of IOL constants referred to as the “Standard” or “Optimized” constants (a0, a1 and
a2) are used when employing the Haigis IOL formula. The Optimized constants are derived based upon
an analysis of at least 50 sets of postoperative patient data. To obtain the Optimized constants contact:
Wolfgang Haigis, MS, Ph.D.
Head of the Biometry Department
University Eye Hospital
11, Josef-Schneider-Str.
D-97080 Wuerzburg / Germany
TEL: +49 (931) 201-20640 and +49 (931) 201-1
FAX: +49 (931) 201-20454
E-MAIL: w.haigis@augenklinik.uni-wuerzburg.de
At the present time there are two websites on the Internet which contain additional information and
Microsoft Excel spreadsheets which can be used to record patient data for submission to derive the
Optimized Haigis IOL Constants. These websites should be consulted for further information regarding
the submission of clinical data.
For physicians primarily in Europe, Africa and Asia, consult the website:
http://www.augenklinik.uni-wuerzburg.de/uslab/refbfrme.htm
For physicians primarily in North and South America, consult the website:
http://www.doctor-hill.com/download.htm
Doc # 0300-A-1901-3D Appendix - 5
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