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G. Labiris, A. Katsanos, M. Fanariotis, M. Gika, A. Koutsoyianni, S. Alvanos, P. Topalidou, D. Mikropoulos, V. Kozobolis; Determination of Anterior Chamber Volume: Agreement Between Pentacam and the Wang Formula for Visante OCT. Invest. Ophthalmol. Vis. Sci. 2009;50(13):3670.
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To evaluate the level of agreement between anterior chamber volume (ACV) measurements obtained with Pentacam and measurements obtained with the Wang formula for Visante-OCT.
Volunteers with no anterior segment disease were recruited. Visante ACV measurements were obtained by means of the methodology proposed by Wang N. et al in 2007. A Bland-Altman analysis was performed to assess agreement between measurements with Pentacam and Visante-OCT.
One randomly selected eye from 30 participants was analysed. Spherical equivalent ranged between -2.50 D and +1.50 D. Mean±SD age was 56.3 ± 17.4 years with a range from 25 to 79 years. Mean±SD Pentacam ACV was 171.07 ± 39.64 µl (Vmin=103 µl and Vmax= 236 µl), while mean±SD Visante ACV was 171.38 ± 42.38 µl (Vmin=96.37 µl and Vmax= 245.54 µl). The mean difference between measurements was -0.318 and the 95% limits of agreement were -11.09 and 11.09. The differences between measurements were within the 95% limits of agreement in all but one eye.
High levels of agreement were found between anterior chamber volume measurements obtained with Pentacam and measurements obtained with Visante-OCT when the Wang formula was used.
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