[Development of ophthalmologic software for handheld devices].
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Date
2006-11-22
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Abstract
INTRODUCTION The formulas for calculation of intraocular lenses have evolved since the first theoretical formulas by Fyodorov Among the second generation formulas the SRK I formula has a simple calculation taking into account a calculation that only involved anteroposterior length IOL constant and average keratometry With the evolution of those formulas complexicity increased making the reconfiguration of parameters in special situations impracticable In this way the production and development of software for such a purpose can help surgeons to recalculate those values if needed PURPOSE To idealize develop and test a Brazilian software for calculation of IOL dioptric power for handheld computers METHODS For the development and programming of software for calculation of IOL we used PocketC program OrbWorks Concentrated Software USA We compared the results collected from a gold standard device Ultrascan Alcon Labs with the simulation of 100 fictitious patients using the same IOL parameters The results were grouped for ULTRASCAN data and SOFTWARE data Using SRK T formula the range of those parameters included a keratometry varying between 35 and 55D axial length between 20 and 28 mm IOL constants of 118 7 118 3 and 115 8 RESULTS Using Wilcoxon test it was shown that the groups do not differ p 0 314 We had a variation in the Ultrascan sample between 11 82 and 27 97 In the tested program sample the variation was practically similar 11 83 27 98 The average of the Ultrascan group was 20 93 The software group had a similar average The standard deviation of the samples was also similar 4 53 CONCLUSION The precision of IOL software for handheld devices was similar to that of the standard devices using the SRK T formula The software worked properly was steady without bugs in tested models of operational system