This corrected, average corneal power in keratometric diopters is then used with the regular Haigis formula to calculate the power of the intraocular lens. In essence, what myopic Haigis-L does is begin with a small intermediate area and then correct it …

This paper explains the new formula (Haigis-L) in detail and illustrates it with clinical results of cataract surgeries in 187 eyes after laser treatment for myopia.

2021年6月11日 · Haigis-L performed worse than SRK/T corrected K and Shammas-PL in predicting IOL power in extremely long axis (>29.0 mm) eyes after myopic LASIK, especially with extremely flat corneas (K < 35...

The Haigis formula recommends an IOL power based on a three-variable (a 0, a and a) function. The a constant is tied to the measured ACD, while the a constant is tied to the measured AL. This allows all three constants to be optimized for a wide range of ALs and ACDs using double-regression analysis.

2008年11月18日 · The new Haigis-L formula for calculating appropriate IOL power in patients who have previously undergone refractive laser surgery for myopia is described in thi

With three lens constants, the Haigis formula is able to make adjustments adding or subtracting power when necessary, based on actual observed results for a specific surgeon and the individual geometry of an intraocular lens implant.

2008年10月1日 · This paper explains the new formula (Haigis-L) in detail and illustrates it with clinical results of cataract surgeries in 187 eyes after laser treatment for myopia.

The Haigis formula, like other optical formulas, is based on thin lens optics. However, while all other formulas use only one constant (like the ACD constant, the A-constant, or the surgeon factor) for a given IOL, the Haigis formula uses three (a 0, a 1, and a 2).

Conclusions: The Haigis-L formula was relatively accurate in predicting extreme long axis (>29.0 mm) eyes after myopic LASIK surgery but less accurate for eyes with extremely flat corneas (<35 D). SRK/T corrected K and Shammas-PL performed better than the other methods for refractive prediction in this type of eyes.

Purpose: To describe the Haigis-L formula for the calculation of intraocular lenses (IOLs) after refractive laser surgery for myopia based on current biometry and keratometry and present clinical results. Setting: University Eye Hospital, Wuerzburg, …