Warren Hill, M.D. Eye Surgery Information Download Area
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Haigis-200-EU.xls(Microsoft Excel file):
For physicians mainly in Europe, Africa and Asia, this Excel spreadsheet can
be used to submit data for optimizing the a0, a1 and a2 constants for the
Haigis formula. The central corneal radius for this version must be entered
in mm.
Haigis-200-NA.xls(Microsoft Excel file):
For physicians mainly in North and South America, this Excel spreadsheet can
be used to submit data for optimizing the a0, a1 and a2 constants for the
Haigis formula. The central corneal power for this version must be entered
in diopters.
Optimization.doc(Microsoft Word file):
Before entering data into your Excel spreadsheets, please download these instructions and follow them exactly.
This download is a set of detailed instructions on how to complete and submit the Excel spreadsheet that will be used to derive your set of surgeon and IOL specific a0, a1 and a2 Haigis constants. Patient Data (Microsoft Word file):
IOL power calculation request form, used to send patient measurements and information to our office.
R-verg-Hill.xls(Microsoft Excel file):
A Microsoft Excel spreadsheet containing the refractive vergence formula as
outlined in:
Holladay JT: Standardizing constants for ultrasonic biometry,
keratometry, and intraocular lens power calculations. J Cataract Refract
Surg 1997; 23: 1356 - 1370.
The more sophisticated Holladay R formula is
recommended, which is part of the
Holladay IOL Consultant software package.
4-IOL-constants.xls(Microsoft
Excel file):
A Microsoft Excel spreadsheet that can be used to calculate an average IOL constant
based on data from 100 patients for four popular formulas (Holladay 1, Hoffer
Q, SRK II and SRK/T). Data for all 100 patients must be entered for the spreadsheet
to work correctly. This spreadsheet can be used to arrive at an IOL constant
starting point prior to formal optimization using the Holladay IOL Consultant,
or the internal lens constant optimization software that comes with your biometer
(standard A-scan ultrasound, or the IOLMaster). This spreadsheet should not
to be used as the sole method of IOL constant optimization. If you have less
than 100 cases entered, you may send the spreadsheet to Dr. Hill for analysis.
Formula
