Influence of Patient Age on Intraocular Lens Power Prediction Error

Hayashi, Ken; Ogawa, Soichiro; Yoshida, Motoaki; Yoshimura, Kenichi

doi:10.1016/j.ajo.2016.08.016

Cited by 24 publications

(19 citation statements)

References 33 publications

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“…Though the follow-up time was less than 6 months and glaucoma drainage device surgery was included in the combined group, it remains a meaningful result. Old age has been associated with structural changes of scleral collagen ber and changes of ACD [40,41], therefore, some studies reported that age of patients may affect the refractive outcomes after cataract surgery [42,43]. Our study also supports this result, as old age appeared to be risk factor up to 12 months after phacotrabeculectomy.…”

Section: Discussionsupporting

confidence: 87%

Long-Term Refractive Outcomes After Combined Phacoemulsification and Trabeculectomy in Glaucoma Patients

Kang

et al. 2020

Preprint

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Background: To investigate long-term refractive outcomes after phacotrabeculectomy and to determine risk factors that may cause unstable refractive outcomes after phacotrabeculectomy in glaucoma patients.Methods: A total 120 eyes of 120 patients who had underwent uncomplicated phacotrabeculectomy (combined group) or phacoemulsification (phaco-only group) were included. Best-corrected visual acuity (BCVA), intraocular pressure (IOP) were measured before and after surgery, and anterior segment parameters including anterior chamber depth (ACD), lens vault (LV), and anterior vault (AV) measured using anterior-segment optical coherence tomography were compared between the two groups. The mean absolute error (MAE) at 3, 6, 12, and 24 months postoperatively were compared. Risk factors associated with unstable refractive outcomes (MAE ≥ 0.5) were investigated in the combined group.Results: In both groups, BCVA was improved and IOP was decreased significantly. MAE at 3, 6, 12, 24 months postoperatively were not significantly different between two groups. The risk factors for unstable refractive outcomes after 12 months of phacotrabeculectomy were old age and LV. Whereas, the only factor predicting unstable refractive outcome after 24 months of phacotrabeculectomy was LV. The cut-off value of LV for predicting unstable refractive outcome analyzed by the ROC curve was 0.855 mm.Conclusions: Phacotrabeculectomy may be an effective treatment with predictable long-term refractive outcomes similar to phacoemulsification in patients with glaucoma. However, elderly patients or patients with large LV may be predisposed to unpredictable postoperative refractive outcomes after phacotrabeculectomy.

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Section: Discussionsupporting

confidence: 87%

Long-Term Refractive Outcomes After Combined Phacoemulsification and Trabeculectomy in Glaucoma Patients

Kang

et al. 2020

Preprint

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“…The availability of larger dataset will allow to use powerful tools to systematically retrieve the best set of features 33 (i.e. those most informative, such us, lens geometrical parameters, age 34 , preoperative refraction, …) as well as a mathematical expression (N-dimensional, linear or non-linear) depending on these features to estimate the ELP.…”

Section: Discussionmentioning

confidence: 99%

Estimation of intraocular lens position from full crystalline lens geometry: towards a new generation of intraocular lens power calculation formulas

Martinez-Enriquez

Pérez-Merino

Durán-Poveda

et al. 2018

Sci Rep

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In a cataract surgery, the opacified crystalline lens is replaced by an artificial intraocular lens (IOL). To optimize the visual quality after surgery, the intraocular lens to be implanted must be selected preoperatively for every individual patient. Different generations of formulas have been proposed for selecting the intraocular lens dioptric power as a function of its estimated postoperative position. However, very few formulas include crystalline lens information, in most cases only one-dimensional. The present study proposes a new formula to preoperatively estimate the postoperative IOL position (ELP) based on information of the 3-dimensional full shape of the crystalline lens, obtained from quantitative eye anterior segment optical coherence tomography imaging. Real patients were measured before and after cataract surgery (IOL implantation). The IOL position and the postoperative refraction estimation errors were calculated by subtracting the preoperative estimations from the actual values measured after surgery. The proposed ELP formula produced lower estimation errors for both parameters -ELP and refraction- than the predictions obtained with standard state-of-the-art methods, and opens new avenues to the development of new generation IOL power calculation formulas that improve refractive and visual outcomes.

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“…The older age of patients in group P might be the reason for the inaccurate refractive outcome in group P. The mean age was significantly higher in the order of group P, group D, and group S, and the older age might have resulted in poor cooperation during biometry measurement and poor refractive outcome. Previous studies have shown that older age is associated with IOL power prediction error and that it can be a risk factor for higher refractive error after cataract surgery 20,21 . Besides age, there was no significant difference in AL and K between groups.…”

Section: Discussionmentioning

confidence: 99%

Inter-ocular and inter-visit differences in ocular biometry and refractive outcomes after cataract surgery

Choi

Yoo

et al. 2020

Sci Rep

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This study aimed to determine whether inter-ocular differences in axial length (AL), corneal power (K), and adjusted emmetropic intraocular lens power (EIOLP) and inter-visit differences in these ocular biometric values, measured on different days, are related to refractive outcomes after cataract surgery. We retrospectively reviewed 279 patients who underwent phacoemulsification. Patients underwent ocular biometry twice (1–4 weeks before and on the day of surgery). Patients were divided into three groups: group S (similar inter-ocular biometry in different measurements; n = 201), group P (inter-ocular differences persisted in the second measurement; n = 37), and group D (inter-ocular difference diminished in the second measurement; n = 41). Postoperative refractive outcomes (mean absolute errors [MAEs]) were compared among the groups. Postoperative MAE2, based on second measurement with reduced inter-ocular biometry difference, was smaller than that calculated using the first measurement (MAE1) with borderline significance in group D (MAE1, 0.49 ± 0.45 diopters vs. MAE2, 0.41 ± 0.33 diopters, p = 0.062). Postoperative MAE2 was greater in group P compared to the other two groups (p = 0.034). Large inter-ocular biometry differences were associated with poor refractive outcomes after cataract surgery. These results indicate that measurements with smaller inter-ocular differences were associated with better refractive outcomes in cases with inter-visit biometry differences.

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Influence of Patient Age on Intraocular Lens Power Prediction Error

Abstract: PE was less myopic by approximately 0.06 D per decade as age increased, suggesting that patient age should be considered when selecting IOL power.

Cited by 24 publications

References 33 publications

Long-Term Refractive Outcomes After Combined Phacoemulsification and Trabeculectomy in Glaucoma Patients

Long-Term Refractive Outcomes After Combined Phacoemulsification and Trabeculectomy in Glaucoma Patients

Estimation of intraocular lens position from full crystalline lens geometry: towards a new generation of intraocular lens power calculation formulas

Inter-ocular and inter-visit differences in ocular biometry and refractive outcomes after cataract surgery

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