Theoretical vs Empirical Prediction of Aphakic Refraction

Olsen, Thomas

doi:10.1001/archopht.1987.01060080044025

Cited by 9 publications

(1 citation statement)

References 24 publications

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“…amounted to 0.12 mm and 0.23 mm in the phacoemulsification and the ECCE group, respectively. This apparent elongation of the axial length, which has been noticed in other studies (Olsen 1987), may tentatively be explained by an erroneous velocity of ultrasound assumed for the phakic eye. To eliminate it, one would have to assume a higher velocity of ultrasound in the biological lens than normally assumed.…”

Section: Discussionsupporting

confidence: 55%

Refractive results after phacoemulsification and ECCE

Dam-Johansen

Olsen

1993

Acta Ophthalmologica

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The refractive results were evaluated in 79 patients undergoing cataract extraction by phacoemulsification using a 6-7 mm tunnel incision, and compared with a group of 77 patients undergoing planned extracapsular cataract extraction (ECCE) by the same surgeon. A mean increase in the keratometric cylinder of 0.05D and 0.52D was found in the phacoemulsification and the extracapsular cataract extraction group, respectively. This was significantly different from zero for the extracapsular cataract extraction group (p < 0.05) but not for the phacoemulsification group (p > 0.05). By vector analysis, the mean surgically induced astigmatism was 0.91D and 1.36D in the phacoemulsification and the extracapsular cataract extraction group, respectively (p < 0.01). The IOL power prediction error (spectacle plane) was found to be 0.17D (+/- 0.69 SD) in the phacoemulsification group and 0.02 D (+/- 0.79 SD) in the extracapsular cataract extraction group, respectively. We conclude that phacoemulsification improves the surgical control of the refractive outcome of cataract surgery.

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Section: Discussionsupporting

confidence: 55%