Alterações biométricas induzidas por lentes intra-oculares de câmara anterior para o tratamento da alta miopia em olhos fácicos

Alterações biométricas induzidas por lentes intra-oculares de câmara anterior para o tratamento da alta miopia em olhos fácicos


Marcia D. Fernandes,
Wladimir Kawagoe,
Wallace Chamon,
Norma Allemann,
Mauro Campos


Arquivos Brasileiros de Oftalmologia

versão impressa ISSN 0004-2749versão On-line ISSN 1678-2925

Arq. Bras. Oftalmol. vol.61 no.2 São Paulo abr. 1998



The goal of this study is to evaluate the role of anterior chamber phakic IOL for myopia correction implantation in the ultrasonographic axial length measure-ment.

Patients and Methods:

Axial length measurement was performed in 20 high myopic eyes that underwent anterior chamber phakic IOL implantation. Measurement was evaluated preoperatively using the ultrasound phakic MODE, and postoperatively using both, phakic and pseu-dophakic MODES.


Using the phakic MODE, IOL implantation led to an overestimation of the axial length from 30.55 mm to 30.70 mm (p<0.025). There was no statistical difference between the preoperative and the pseudophakic MODE (p = 0.143). Phakic MODE measurements were 0.46%c greater and pseudophakic MODE 0.52%c smaller, when comparing to preoperative measurements. IOL implantation did not influence the variability of ultrasound biometry.


White the specific sound velocity for phakic eyes that underwent IOL implantation has not been determined, surgeons should use an average of pseudophakic MODE ultrasonographic axial length measurements to calculate the best aphakic IOL dioptric power to be im-planted in an inevitable cataract surgery.

Key words: Biometry; High myopia; Intraocular tenses


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