Research Article
New Approach for the Calculation of the Intraocular Lens Power Based on the Fictitious Corneal Refractive Index Estimation
Figure 1
(a) Model for the calculation of the corneal power derived from anterior corneal radius (rk) and fictitious index (nk). The effective lens positions for vergence thin lens formula (ELPo) and for thick lens formula (ELPk) are shown. 1.3374 and 1.336 are the refractive indexes for the aqueous and vitreous, respectively. (b) Schema for computing the IOL power based on the thick lens formula, both anterior (r1c) and posterior (r2c) corneal radii were measured, and total corneal power was obtained estimating refractive index of the cornea (nc). Actual lens position (ALP) and effective lens position (ELPc) from principal planes are represented. H1c, H2c, H1l, and H2l are the first and second principal planes for the cornea and the IOL.
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