Refractive Stabilization and Corneal Swelling After Cataract Surgery

Juan, Victoria de; Herreras, José M.; Pérez, Isidro A.; Morejon, Angela; Cristobal, Ana Rio-San; Martín, Raúl; Fernández, Itziar; Rodríguez, Guadalupe

doi:10.1097/opx.0b013e318278fc44

Cited by 34 publications

(50 citation statements)

References 30 publications

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“…; de Juan et al. ). This early shift may be related to changes in anterior chamber depth and IOL position within the eye.…”

Section: Discussionmentioning

confidence: 98%

“…from ; both spherical refraction and cylinder refraction were stable after 1 week, even though the corneal swelling significantly continued to diminish past the first week after surgery (de Juan et al. ). In our study, the amount of cylinder refraction was not stable after 1 week.…”

Section: Discussionmentioning

confidence: 99%

“…The day after cataract surgery, eyes are often slight hyperopic compared to their refractive target, and a minor myopic shift is often observed the week after cataract surgery (Sugar et al 2001;de Juan et al 2013). This early shift may be related to changes in anterior chamber depth and IOL position within the eye.…”

Section: Discussionmentioning

confidence: 99%

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Automated refraction is stable 1 week after uncomplicated cataract surgery

Ostri

Holfort

Fich

et al. 2017

Acta Ophthalmologica

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“…; de Juan et al. ). This early shift may be related to changes in anterior chamber depth and IOL position within the eye.…”

Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Automated refraction is stable 1 week after uncomplicated cataract surgery

Ostri

Holfort

Fich

et al. 2017

Acta Ophthalmologica

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“…[2] Researchers demonstrated that automated refraction becomes stable one week after the phacoemulsification and can be used to prescribe corrective lenses at this time. [3]…”

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confidence: 99%

Personal A-constant in relation to axial length with various intraocular lenses

Eldaly

Mansour

2014

Indian J Ophthalmol

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Purpose:To study the relationship between the axial length and personal A-constant for the 1-piece Tecnis (Abbott ZCB00), AcrySof MA60AC (Alcon) and the Quatrix aspheric preloaded (CROMA) intraocular lenses (IOL).Materials and Methods:Patients matching the inclusion criteria were further subdivided according to the implanted IOL in this prospective comparative study. The obtained refractive outcomes were introduced into the formula installed in the biometry machine (Humphrey model 820 ultrasonic biometer) to obtain the personal A-constant for each eye. Polynomial regression analysis was done to study the individualized A-constant for each type of IOL in relation to preoperative axial length measurement.Results:Two hundred and forty five eyes of 186 patients were enrolled into this study, of whom 73 eyes with Tecnis 1-piece, 116 eyes with MA60AC, and 56 eyes with Quatrix. The median of personalized A-constant for Tecnis 1-piece, MA60AC, and Quatrix were 119.21 (SD 1.3, Std. Mean error 0.15), 119 (SD 1.2, Std. Mean error 0.11) and 120.4 (SD 1.2, Std. Mean error 0.16) respectively. Regression plots for the same range of axial length among all the groups showed that the Tecnis1 group followed the same pattern of the Quatrix group in which there was a linear relationship of a trend towards myopia when the axial length had increased and a hyperopic shift when decreased. This relationship changed into a plateau when the axial length became in the range of 23.5 mm to 27 mm in the MA60AC group.Conclusions:Personal A-constant follows different trends with different IOLs even for the same range of axial length.

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“…Most of those studies were retrospective and evaluated the spherical equivalent, but it is more accurate to distinguish between spherical and cylindrical refraction. In a prospective study, we found that refraction (spherical and cylindrical component) was stabilized one week after surgery [6]. Nevertheless, we caution about the general applicability of our findings.…”

Section: Institute Of Applied Ophthalmobiology (Ioba-eye Institute) mentioning

confidence: 45%

Prediction of Refractive Stabilization after Cataract Surgery…Is it Possible?

Juan¹

2012

J Clinic Experiment Ophthalmol

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The goals of modern cataract surgery include restoration of vision as completely and rapidly as possible while minimizing complications. At the same time, postoperative refractive errors should be negligible [1]. Although the refractive outcome is not the unique measure to determine the success, low refractive errors with rapid stabilization improve patient satisfaction and quality of life [2]. However, a pronounced, transient postoperative corneal swelling lasting approximately two weeks is sometimes noted after phacoemulsification surgery [3]. Evaluation of postoperative corneal swelling is easily done with ultrasonic or optical pachymetry and is important because swelling can cause refractive changes that limit fast visual rehabilitation. There are few studies evaluating stabilization of refraction after cataract surgery with minimal changes after two weeks [4,5]. Most of those studies were retrospective and evaluated the spherical equivalent, but it is more accurate to distinguish between spherical and cylindrical refraction. In a prospective study, we found that refraction (spherical and cylindrical component) was stabilized one week after surgery [6]. Nevertheless, we caution about the general applicability of our findings. Other than the presence of cataracts, we included only healthy eyes, the surgery was performed by the same experienced surgeon who used the same technique throughout, and there were no surgical complications. Therefore, our results can be extrapolated only to populations with similar characteristics.To meet the high expectations of patients following cataract surgery, further studies and advances are needed in all areas, including methods of predicting the moment of refractive stabilization (RS). This information could be useful to surgeon to improve the information given to patients before surgery. Besides, it would reduce the visits until the final prescription.However, no comprehensive data on the relationship between some factors (pre and post surgical) and refractive stabilization have been reported. A few months ago, we studied 163 eyes (mean age of 66.14 years) undergoing cataract surgery. Preoperative predictors included age, lens opacity, optical biometry, and automated refraction, among others. Also intraoperative predictors (surgical technique, ultrasound time, aspiration time and flow rate) were included.The predictive equation for RS was.28 axial length where h(t) is the probability of RS at time t and h 0 (t) is the baseline probability when all the explanatory variables are zero. Discrimination and calibration of the final model were good, but today it is still not possible to predict when the refraction stabilizes. It is necessary to evaluate this predictive equation by means a multicenter and prospective study.In summary, prediction of refractive stabilization will be possible but there is still a lot of work to do.

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Refractive Stabilization and Corneal Swelling After Cataract Surgery

Cited by 34 publications

References 30 publications

Automated refraction is stable 1 week after uncomplicated cataract surgery

Automated refraction is stable 1 week after uncomplicated cataract surgery

Personal A-constant in relation to axial length with various intraocular lenses

Prediction of Refractive Stabilization after Cataract Surgery…Is it Possible?

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