Background: To investigate the influence of age on prediction error (PE) after cataract surgery in very elderly (VE) patients aged more than 90 years.
Methods: We retrospectively analyzed 66 eyes of patients aged ≥90 years (VE group) who underwent phacoemulsification and intraocular lens (IOL) implantation. As the control group (CG), we investigated 121 eyes of patients aged 70-89 years who underwent the same surgery. PE was calculated 1 month post-surgery as the actual postoperative spherical equivalent minus the target diopter, which was calculated using the Sanders-Retzlaff-Kraff/T formula. The absolute and arithmetic PE were compared between the two groups. The factors affecting absolute PE outside ±0.5 diopter (D) and ±1.0 D were determined through logistic regression analysis with the variables age, sex, axial length (AL), average corneal power, preoperative best-corrected visual acuity, target diopter, and coexisting pseudoexfoliation syndrome.
Results: The absolute PE was significantly larger in the VE group than that in the CG (0.60 ± 0.52 D and 0.34 ± 0.25 D, respectively; P < .001). There was no significant difference in terms of arithmetic PE between the two groups (-0.06 ± 0.79 D and -0.07 ± 0.42 D, respectively; P = .653). In the logistic regression analysis, age was significantly associated with absolute PE outside ±0.50 D (Odds ratio [OR]: 1.05). Age and AL were significantly associated with absolute PE outside ±1.0 D (OR: 1.24 and 0.20, respectively).
Conclusions: Absolute PE tended to increase in the cataract surgery of VE patients.
Keywords: IOL calculation; Prediction error; SRK/T; cataract surgery; very elderly patients.