If the combination is replaced by a single lens of focal length F such that it forms the image of O at the position I, 1/v - 1/ u = 1/ F……(4) This type of lens is called the equivalent lens for the combination. Combining (3) and (4), 1/F = 1 / f1+ 1/ f2……(5)...
Artificial intraocular lens with variable optical power comprising at least two optical elements (1, 2) which can be moved relative to each other in a direction extending perpendicular to the optical axis wherein the optical elements (1, 2) are shaped having, in combination, different optical ...
Postoperative lens location was expressed as a linear regression formula of axial length and corneal curvature. Using the formula, the IOL power of a convexplano, biconvex, and planoconvex lens was calculated by Ray Tracing Error Correction (RTEC). The calculated power of a convexplano lens coin...
To develop a novel machine learning-based intraocular lens (IOL) power calculation formula for highly myopic eyes. A total of 1828 eyes (from 1828 highly myopic patients) undergoing cataract surgery in our hospital were used as the internal dataset, and
AppEvents_SheetLensGalleryRenderCompleteEventHandler AppEvents_SheetPivotTableAfterValueChangeEventHandler AppEvents_SheetPivotTableBeforeAllocateChangesEventHandler AppEvents_SheetPivotTableBeforeCommitChangesEventHandler AppEvents_SheetPivotTableBeforeDiscardChangesEventHandler AppEvents_SheetPivotTableUpdateEventHa...
Conclusion Compared with the SRK-II formula,the SRKT formula is more applicable to the eyes with the axial length≥29.0 mm,and the results of the SRK-T formula are more accurate. 展开 关键词: high myopia cataract intraocular lens theoretical formula ...
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The dioptric power of a single interface between two media is the difference of refractive index divided by the radius of curvature of the surface.The combination of two thin lenses at a close distance has a dioptric power which is simply the sum of the powers of the two lenses. If the ...
To develop a novel algorithm based on ray tracing, simulated visual performance and through-focus optimization for an accurate intraocular lens (IOL) power calculation. Custom-developed algorithms for ray tracing optimization (RTO) were used to combine the natural corneal higher-order aberrations (HOAs...
Objective To compare the accuracy of a new intraocular lens (IOL) power formula (Kane formula) with existing formulas using IOLMaster, predominantly model 3, biometry (measures variables axial length, keratometry and anterior chamber depth) and optimised lens constants. To compare the accuracy of th...