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Stephanie Wise, Jing Wang, Anjana Rathod, N K. Wade; IOL Formula Accuracy and Precision in Three Mono Focal Aspheric Lenses. Invest. Ophthalmol. Vis. Sci. 2012;53(14):6735.
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To compare IOL formula accuracy and precision in predicting post operative spherical equivalent (SE) outcomes and as well, to compare accuracy and precision in three lenses.
A retrospective chart review of 90 eligible cataract surgery patients receiving either the Tecnis 1, MIL Akreos or Alcon Acrysof IQ lens was performed. The Holladay 1, Haigis and SRK/T formulas calculated predicted SE for each lens. Differences between predicted SE and post operative SE were analyzed using means and standard deviations (SD). Means were used as a measure of accuracy and SD were used as a measure of precision.
The Tecnis 1 lens had the lowest mean using the SRK/T formula and lowest SD using the Holladay 1 formula. All three formulas had near equal means in the Alcon Acrysof IQ lens, however the SRK/T formula had the lowest SD. The MIL Akreos lens had the lowest mean and SD using the Holladay 1 formula. Among the lenses, the lowest means and SD were achieved with the Tecnis 1 lens, while the MIL Akreos lens had the highest means and SD.
The Tecnis 1 lens is most accurate with the SRK/T formula, most precise with the Holladay 1 formula, both most accurate and precise with the Haigis formula. The Alcon Acrysof IQ lens is nearly equal accuracy and precision in all three formulas. The MIL Akreos lens is most accurate and precise with the Holladay 1 formula. Of the three lenses in the study, the Tecnis 1 lens performed better compared to others in accuracy and precision and the MIL Akreos lens performed poorly compared to others.
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