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First Author: R.Almeida PORTUGAL
Co Author(s): J. Guilherme-Monteiro G. Calvão-Santos P. Neves R. Leitão C. Manso J. Salgado-Borges
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To assess the agreement between the optical low-coherence biometer Lenstar LS 900® and ultrasound, when used for biometry and intraocular lens (IOL) power calculation for cataract surgery.
Setting/Venue: Ophthalmology Department of the Centro Hospitalar de Entre o Douro e Vouga, Santa Maria da Feira, Portugal.
201 eyes of 109 patients programmed for cataract surgery were evaluated. Ultrasound biometry (US) was performed with the OcuScan RxP® (Alcon, Fort Worth, EUA) and optical low-coherence biometry (OPT) with the Lenstar LS 900® (Haag-Streit Ag, Köniz/ Switzerland). The axial length (AL), anterior chamber depth (ACD) and IOL power (calculated by SRK/T formula) obtained by the two devices were compared.
The values of AL were 23.18 ±0.59 mm with the OPT and 23.00 ±0.57 mm with the US (p< 0.001). For ACD the values were 3.21 ±0.39 mm and 3.13 ±0.34 mm (p< 0.001), respectively with the OPT and the US. The IOL power was 22.30 ±1.49 D with the OPT and 22.73 ±1.34 D with the US (p< 0.001).
In the past few years there has been an increased requirement for accuracy in IOL power calculation, for cataract and implanto-refractive surgeries. The results obtained with the OPT and the US biometers are correlated. It will be of interest to verify, after surgery, which of the methods grants the smaller error.