Purchase this article with an account.
DANILO ANDRIATTI PAULO, Adriana Rainha Mascia, Flavio E Hirai, Milton Seiyu Yogi; Intraocular lens (IOL) power calculation and visual outcome comparing optical (Lenstar) and ultrasound measurements.. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):5735.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
To evaluate retrospectively intraocular lens (IOL) power calculation and its results in vision acuity using an optical low-coherence reflectometry (OLCR) biometer, LENSTAR®, and to compare them with those obtained with an ultrasound measurements, in order to give us which sort of calculation has the most accurate IOL.
A group of 100 healthy and normal axial length (22 to 25 mm) eyes, that undergone cataract surgeries successfully, were blindly selected according to their final visual acuity after one month of their surgeries, with neither corneal oedema nor astigmatism higher than 1D. 50% had a final visual acuity better or equal than 20/32 (Snellen Test) after 30 days from the surgery; and 50% were worse than 20/32. In addition, they were divided according to their IOL power calculation, LENSTAR® versus ultrasound measurements, for later being analysed by Fisher’s exact test, and P values less or equal than 0.05 were considered. The IOL calculation was made by expert technicians and the Holladay formula was in use for both sort of equipment.
Among the group with a final acuity better or equal than 20/32, 42 eyes were analysed by ultrasound and 7 by LENSTAR®; the comparison was not statistically relevant (P=0,4411). On the other group (worse than 20/32), 38 eyes were analysed by ultrasound and 13 by LENSTAR®; the comparison was not statistically relevant (P=0.9456) as well. Comparing both group together, 80 eyes were analysed by ultrasound and 20 by LENSTAR®; likewise, the proportion was not statistically relevant (P=0.161).
Despite the fact that the number of patients that went through the optic or the ultrasound measurements was not similar in this service, the number of eyes from both groups was commensurable. From that, it is possible to infer that there is no statistically relevant difference in the IOL power calculation between both group (ultrasound and LENSTAR®) in this service.
This PDF is available to Subscribers Only