IOL power mislabelling

Olsen, Thomas; Olesen, Henrik

doi:10.1111/j.1755-3768.1993.tb04969.x

Cited by 10 publications

(4 citation statements)

References 5 publications

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“…The mislabelling of IOLs has been a problem in some cases in the past (Olsen & Olesen 1993), but it seems to have been seldom reported in recent literature. A recommended procedure would be to verify all measurements by remeasuring the corneal curvature and axial length and comparing the results with preoperative measurements.…”

Section: Optimization and Accuracymentioning

confidence: 99%

“…The measurement of actual postoperative ACD together with a repeat K-reading and (optical) biometry makes it possible based on the observed refraction to back-calculate IOL power in situ within an accuracy of ± 1 D. This allows for the diagnosis of a case of IOL mislabelling with reasonable accuracy. The mislabelling of IOLs has been a problem in some cases in the past (Olsen & Olesen 1993), but it seems to have been seldom reported in recent literature. The higher accuracy of optical biometry has greatly improved measuring conditions for diagnosing mislabelled IOLs.…”

Section: Optimization and Accuracymentioning

confidence: 99%

See 1 more Smart Citation

Calculation of intraocular lens power: a review

Olsen¹

2007

Acta Ophthalmol Scand

Self Cite

279

228

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This review describes the principles and practices involved in the calculation of intraocular lens (IOL) power. The theories behind formulas for calculating IOL power are described, using regression and optical methods employing 'thin lens' and 'thick lens' models, as well as exact ray-tracing methods. Numerical examples are included to illustrate the points made. The paper emphasizes the importance of establishing an accurate estimation of corneal power as well as an accurate technique for the measurement of axial length and accurate methods of predicting postoperative anterior chamber depth (ACD). It is concluded that current improvements in diagnostic and surgical technology, combined with the latest generation IOL power formulas, make the calculation and selection of appropriate IOL power among the most effective tools in refractive surgery today.

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Section: Optimization and Accuracymentioning

confidence: 99%

Section: Optimization and Accuracymentioning

confidence: 99%

Calculation of intraocular lens power: a review

Olsen¹

2007

Acta Ophthalmol Scand

Self Cite

279

228

View full text Add to dashboard Cite

show abstract

“…The method involves measuring the curvature of the steepest surface of the IOL with a minus lens, which facilitates measuring mires within the keratometer's range. 10 We were unable to verify the primary IOL power in vivo. However, the fact that we observed an improvement in postoperation refraction after using the same IOL powers with the same A constant and with the involvement of +6D indicates that the manufacturer mislabeled the IOL, which is the cause of the refractive surprise.…”

Section: Discussionmentioning

confidence: 94%

“…developed a technique for measuring IOL power using a keratometer. The method involves measuring the curvature of the steepest surface of the IOL with a minus lens, which facilitates measuring mires within the keratometer's range 10 …”

Section: Discussionmentioning

confidence: 99%

Post cataract surgery refractive surprise due to intraocular lens mislabeling

Shokoohi Rad,

Ansari Astaneh,

Kiarudi

et al. 2024

Clinical Case Reports

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Key Clinical MessageIf an intraocular lens (IOL) is incorrectly labeled, problems can arise for surgeons and patients. Precise biometry is important to accurately determine the IOL power and prevent the implantation of the wrong IOL. Labeling and verifying IOLs with accuracy is crucial to ensuring the best possible results of cataract surgery.AbstractMislabeling of IOLs can cause unpredictable problems for surgeons. However, we can prevent incorrect IOLs by using precise biometry to determine accurate IOL power and safely implant the correct IOL. A 50‐year‐old female with no medical or ocular history came to our clinic complaining of decreased vision in both eyes that had been ongoing for several months. After being diagnosed with cataracts, primary angle closure suspect, and high hyperopia, the patient underwent phacoemulsification surgery. A posterior chamber IOL was implanted, and visco‐goniosynechialysis was performed. During follow‐up appointments, it was discovered that the patient had an uncorrected visual acuity of 20/50 in her right eye, which was corrected to 20/20 with a + 7.00 D lens. Upon further evaluation, it was determined that the source of the error was due to a manufacturing mislabeling of the IOL power. The patient then underwent successful IOL exchange surgery, and her best‐corrected visual acuity became 20/20 with no significant refraction. This case highlights an uncommon source of refractive surprise after phacoemulsification surgery, successfully managed with IOL exchange surgery using the same IOL power from a different brand.

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