Correlation of binocular refractive error and calculation of intraocular Lens power for the second eye

Zhang, Pengcheng; Yang, Yuhuan; Yan, Hong; Zhang, Jie; Yan, Weijia

doi:10.1186/s12886-020-01496-9

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…Landers et al compared the inter-ocular relationship of the postoperative refractive outcome in cataract surgery and suggested that each eye should be considered independently in IOL power selection 14 . On the other hand, it has been shown that adjustment using the prediction error of the first eye in bilateral sequential cataract surgery improved the refractive outcome of the second eye, suggesting similar biometric characteristics between two eyes [15][16][17][18][19] .…”

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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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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“…In another animal study [38] , tissue may be less likely to contract under the influence of a small drop in intraocular pressure. The study of Yan Hong et al [39] showed that the normal range of IOP had no correlation with diopter and axial length, so the local application of IOP drugs to control the development of myopia may not be effective. Some studies have found [40] that reducing IOP can thick the choroid thickness, which may improve the blood circulation of the fundus, thus improving the fundus damage caused by high myopia.…”

Section: Discussionmentioning

confidence: 99%

Effect and correlation of intraocular pressure on the refractive status of children and adolescents

Yingying,

xiaoxiao,

xunlang

et al. 2023

Preprint

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Objective: To explore the effect of IOP on the refractive error in children and adolescents, and to analyze the correlation among IOP , AL and diopter of refraction. Methods: Conducting a cross-sectional study. A total of 3256 students (6511 pairs of eyes) aged between 4 and 15 in Jinniu district who presented for ocular health examination during October 2018 and October 2021 were selected, including 1735 boys (3470 eyes) and 1521 girls (3041 eyes).The differences between groups were analyzed by analysis of variance, correlation analysis by Pearson, data were analyzed by statistical software SPSS 25.0. Results: There were significant differences in SE, IOP and AL between each group (P < 0.001), whereas IOP, AL were positively correlated with SE, respectively. The average IOP of female (17.45plus-or-minus sign 2.56mmg) was higher than that of male (17.08 plus-or-minus sign 2.60mmg), while the mean AL of male (23.46 plus-or-minus sign 0.81 mm) was longer than that of female (22.91 plus-or-minus sign 0.83 mm).There was weak or no correlation between IOP and AL (r = 0.126, P < 0.001). No correlation was found between IOP and SE (r = 0.116, P < 0.001). Positive correlation between AL and SE (r = 0.632, P < 0.001) was noted. Conclusion: The increase of myopia degree in children at different ages is manifested by the increase of intraocular pressure and axial length, the increase of axial length is one of the main reasons affecting diopter.However, IOP may not directly lead to increase of myopia in children and adolescents within the range of normal IOP.

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“…For the calculation of IOL power in the second eye (left), we assumed that the left eye would produce the same refractive error as the right eye, so the target of 0.0 D was set which ended up with −1.5 D postoperatively. Zhang et al [ 16 ] reported that it may be more accurate to estimate the degree of error in the second eye as half the refractive error in the first eye. Consistent with that report, our patient had a myopia drift of 4.0 D in her right eye and 1.5 D in her left eye.…”

Section: Discussionmentioning

confidence: 99%

Intraocular lens power calculation after radical keratotomy and photorefractive keratectomy: A case report

Xiong¹,

Mu²,

Chen³

et al. 2022

Medicine

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Rationale: To report a rare case of calculating the IOL power in a cataract patient who underwent both radial keratotomy (RK) and photorefractive keratectomy (PRK). Patient concerns: A 48-year-old woman underwent bilateral RK at age 22 and bilateral PRK at age 46. She developed bilateral corneal haze and corneal endothelial inflammation and received steroids therapy for long time after PRK. Then she was referred to our hospital due to decreased vision in the both eyes. Diagnoses: The patient was diagnosed with binocular complicated cataract, corneal haze, high myopia and post corneal refractive surgery (RK and PRK). Interventions: The patient underwent bilateral phacoemulsification. The IOL power was calculated using SRK/T formula for RK and Haigis-L formula for PRK, respectively. We finally selected the Haigis-L formula and the intraocular lens (SN60WF) was implanted within the capsular bag. Outcomes: After the surgery, both eyes showed myopia drift, and the right eye continuously fluctuated in refractive results. However, by nearly 1 year later, refractive results in both eyes had stabilized, and no other complications had occurred. Lessons: IOL power in patients who undergo both RK and PRK can be reliably calculated using the Shammas-PL, Average of multiple formulas, or Barret True-K No History formulas. Haigis-L formula is not suitable. Such patients require at least three months after surgery to attain refractive stability in both eyes.

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Correlation of binocular refractive error and calculation of intraocular Lens power for the second eye

Cited by 4 publications

References 21 publications

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

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

Effect and correlation of intraocular pressure on the refractive status of children and adolescents

Intraocular lens power calculation after radical keratotomy and photorefractive keratectomy: A case report

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