• Original article (Clinical research) • Previous Articles     Next Articles

Evaluation of intraocular lens powers in eyes with short axial lengths

SHEN Yin-chen, WANG Yu-lan, ZHU Bi-jun, XU Xian, SUN Yong, ZHENG Gao-xin, Chen Feng-e, XU Xun   

  1. Department of Ophthalmology, Shanghai First People’s Hospital, Shanghai Jiao Tong University, Shanghai 200080, China
  • Online:2017-01-28 Published:2017-01-19
  • Supported by:

    Major Science and Technology Program in the National “12th 5-year Plan” of China, 2011ZX09302-007-02;National Natural Science Foundation of China,
    81273424, 81170862;Project of Science and Technology Committee of Shanghai Municipality, China, 16140901003


Objective · To evaluate the predictive accuracy of SRK-Ⅱ , SRK/T, Haigis, Hoffer Q, and Holladay formulas on postoperative refraction error values in cataract patients with short axial length eyes. Methods · Fifty-five short axial length eyes of 42 patients with cataract were recruited. All the patients underwent phacoemulsification surgery and posterior chamber intraocular lens implantation. Corneal curvature, anterior chamber depth and axial length were measured by IOL Master before the surgery. SRK-Ⅱ, SRK/T, Haigis, Hoffer Q, and Holladay formulas were adopted to calculate predictive refraction after
operation. Three to six months after operation follow-up visits were carried out to measure the refractive power of all the eyes and calculate the differences
between the actual refraction powers and the predicted. Results · Among the 55 eyes, there were 28, 26, 27, 20, and 24 eyes shifting to hyperopias and 27, 29, 28, 35, and 31 eyes to myopia according to SRK-Ⅱ, SRK/T, Haigis, Hoffer Q, and Holladay formula, respectively. The values of postoperative myopic shift
were statistically different among the 5 formulas (F=6.276, P=0.000), but those of the postoperative hyperopic shift were not (F=1.351, P=0.225). Hoffer Q
and Holladay formula showed good accuracy. Haigis formula leaded to more myopia (P=0.000). In addition, there were 11, 12, 11, 21, and 16 eyes with less
than 0.25 D of absolute errors calculated by SRK-Ⅱ, SRK/T, Haigis, Hoffer Q, and Holladay formula, respectively. However, the distribution of the absolute
errors of 5 formulas was not statistically significant (P=0.163). Conclusion · In short axial length eyes, Hoffer Q and Holladay formula showed a good
accuracy. Haigis formula leads to more myopia.

Key words: intraocular lens power calculation formula, cataract, short axial length eye