July 2019
Volume 60, Issue 9
Open Access
ARVO Annual Meeting Abstract  |   July 2019
Preoperative factors causing refractive errors after cataract surgery
Author Affiliations & Notes
  • Kwang hyun Kim
    ophthalmology, Hallym sacred heart hospital, Anyang, Korea (the Republic of)
  • Footnotes
    Commercial Relationships   Kwang hyun Kim, None
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science July 2019, Vol.60, 492. doi:
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      Kwang hyun Kim; Preoperative factors causing refractive errors after cataract surgery. Invest. Ophthalmol. Vis. Sci. 2019;60(9):492.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : To explore the factors that affect the refractive errors after cataract surgery.

Methods : Subjects who had undergone uneventful cataract surgery between May 1, 2017 and September 31, 2018 were included in this retrospective case series. Most patients were measured preoperatively with the Lenstar 500 optical biometry and unavailable patients were measured with A-scan ultrasonography. SRK-T and Hagis formulas were used for IOL calculation. The differences between predicted refraction and postoperative manifest refraction(refractive difference) at 1 day, 1 week, 1 month after surgery were calculated. The preoperative factors such as axial length, predicted IOL diopter, average keratometric value, and corneal astigmatism were investigated for the correlation with refractive difference in both IOL calculation formulas.

Results : A total of 1051 eyes from 1017 subjects (age 71.4±2.8) were included in this analysis. The refractive difference was -0.07±0.63( -3.03D ~2.05D). Axial length and IOL diopter showed significant correlation with refractive difference in both formulas(p<0.001). The steeper average keratometric value showed the hyperopic refractive differences with Hagis formula (p=.001) but lead to myopic error with SRK-T formula(p=.000). The corneal astigmatism had no correlation with refractive difference in both formulas(p>0.05).

Conclusions : Longer axial length and lower IOL diopter could lead to hyperopic shift after cataract surgery and steep corneal curvature could cause postoperative refractive errors.

This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.

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