J Korean Ophthalmol Soc.  2008 Nov;49(11):1746-1751.

Accuracy of Biometry and Intraocular Lens Power Calculation With Partial Coherence Interferometry in High Myopia

• Jun RM
• Kang SY
• Kim BY

Abstract

PURPOSE
To investigate the accuracy of biometry and intraocular lens (IOL) power calculation using partial coherence interferometry (IOL Master(R)) in highly myopic patients with axial lengths of 26 mm or greater.
METHODS
Patients with axial lengths equal to or greater than 26 mm who had undergone cataract surgery were enrolled. IOL power was calculated using IOL Master and/or applanation ultrasonography with the SRK/T formula. Twenty-seven eyes using both IOL Master and applanation ultrasonography were included in a paired group, and forty-eight eyes using the IOL Master only and twenty-five eyes using applanation ultrasonography only were included in unpaired groups. The differences between the predicted refraction and the actual refraction were compared and analyzed.
RESULTS
In the paired study, the axial lengths in patients using IOL Master (29.14+/-2.32 mm) were significantly longer than those of patients using applanation ultrasonography (28.57+/-2.23 mm) (p<0.05). The mean absolute error (MAE) of the IOL Master and applanation ultrasonography groups were 0.62+/-0.58D and 0.87+/-0.49D, respectively (p>0.05). In the unpaired study, the MAEs of the IOL Master and applanation ultrasonography groups were 0.61+/-0.61D and 0.65+/-0.63D, respectively.
CONCLUSIONS
In eyes with axial lengths of 26.0 mm or greater, the accuracy of IOL power calculation with IOL Master using the SRK/T formula was comparable to that with applanation ultrasonography.

Keyword

High myopia; IOL calculation; IOL Master

MeSH Terms

Biometry
Cataract
Eye
Humans
Interferometry
Lenses, Intraocular
Myopia

Figure

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  Figure 1. (A) Correlation between axial lengths measured by the IOL Master and ultrasound with correlation coefficient of 0.99, P<0.001. (B) Correlation between the axial length and differences of axial length measured by the two methods with correlation coefficient of 0.60, P<0.05.

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  Figure 2. (A) Mean absolute error in paired group. (B) Mean absolute error in unpaired group.

Reference

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