To compare ocular biometry and refractive results measured using conventional applanation ultrasonography and 3 different optical interferometries, Lenstar LS900®, AL-Scan® and OA-2000®.

The biometries of 31 cataractous eyes were measured using ultrasonography, Lenstar LS900®, AL-Scan® or OA-2000®. The axial length, anterior chamber depth and keratometry were measured. The SRK/T formula was used to calculate intraocular lens power. Two months after cataract surgery, the refractive outcome was determined and results from the 4 different biometry methods were compared.

Axial lengths were 23.39 ± 0.95 mm, 23.42 ± 0.98 mm, 23.43 ± 0.98 mm and 23.44 ± 0.98 mm measured using ultrasonography, Lenstar LS900®, AL-Scan® and OA-2000®, respectively with no statistically significant differences observed ( p = 0.996). The anterior chamber depth and keratometry were 3.14 ± 0.41 mm, 3.10 ± 0.38 mm and 3.13 ± 0.39 mm ( p = 0.936) and 44.41 ± 1.52 D, 44.54 ± 1.57 D and 44.44 ± 1.52 D ( p = 0.937) for Lenstar LS900®, AL-Scan® and OA-2000® respectively. There were no statistically significant differences between the 3 optical devices. The mean absolute error of the 4 different devices were not statistically significant ( p = 0.722).

The ocular biometric measurements and prediction of postoperative refraction using ultrasonography, Lenstar LS900®, AL-Scan® or OA-2000® showed no significant differences.