Software review: Dioptimum.
BEST FEATURES: The software screens all preoperative measurements to detect those likely to be in error. This data screening function is based on statistical analysis of the distribution of eye measurements within the human population. If measurements are input that are far from the average value, the program will identify those cases with a message on the screen and a large warning sign. Nevertheless, the program will perform the requested lens power calculations. The program will also compare measurements between right and left eyes, if both are entered, and a test is performed on the asymmetry between the eyes. WORST FEATURES: The lack of a written owner's manual is probably the most glaring defect of the program, even though most of the important information is present on a disk. Only users familiar with running software programs will be able to easily obtain the data. The program can be installed on a hard disk only two times. For physicians with multiple offices or multiple computers that are not on-line, this is a significant handicap. HARDWARE REQUIREMENTS: Two floppy disk drives, 256K RAM and printer, DOS 3.0 or higher are required. One floppy drive plus a hard drive can also be used. The program will run a TTL monochrome or color monitor but the type of color monitor is not specified. LIST PRICE: $495 COPY PROTECTION: Yes USER SUPPORT: 800 number available EASE OF USE: Good ON SCREEN HELP: Yes CONSUMER VALUE: Very expensive


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Excellent PUBLISHED BY: Storz Ophthalmics, Inc. 1365 Hamlet Avenue Clearwater, FL 34616 (818)-443-2606 or (800)-237-5906 A defective disk can be returned for replacement at no charge within 1 year of the date of purchase. Beyond that date, disks can be replaced at a cost of $10.00. In summary, this is a very well thought out software program for calculating and printing IOL powers using a second-generation lens implant power formula. With appropriate written documentation, the program will become extremely easy to use, even for novices. Because it is so simple to use, surgeons will continually update their personalized surgeon factors and patient data in order to provide patients with the best possible refractive results. A discussion of the use of the Holladay formula in comparison to other formulas is found in reference 2.
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D006801:Humans; D007910:Lenses, Intraocular / Q000592:standards*; D008432:Mathematical Computing; D055095:Optics and Photonics; D012984:Software