Int Ophthalmol (2018) 38:1205–1210 https://doi.org/10.1007/s10792-017-0583-6 ORIGINAL PAPER Effect of refractive status on Valsalva-induced anterior segment changes Necip Kara Serhat Kenan Received: 28 August 2016 / Accepted: 5 June 2017 / Published online: 9 June 2017 Springer Science+Business Media B.V. 2017 Abstract myopic and emmetropic groups, whereas it may affect Purpose To evaluate the effect of the Valsalva only anterior chamber depth in the hyperopic group. maneuver (VM) on anterior segment parameters and its association with refractive status. Keywords Valsalva maneuver Myopia Method In this prospective study, 120 eyes of 120 Hyperopia Cornea Anterior chamber subjects were evaluated. Subjects were divided into three groups: myopic (n = 40 patients), hyperopic (n = 40 patients), and emmetropic (control group, n = 40 subjects). The anterior segment parameters, Introduction including keratometric, pachymetric, and anterior chamber parameters, were measured using the Sirius The Valsalva maneuver (VM) occurs while trying to System (Costruzione Strumenti Oftalmici, Florence, forcibly exhale against a closed glottis and is charac- Italy) before and during VM. terized with increased intrathoracic pressure, reduced Results There was no statistically signiﬁcant differ- venous return, and increased peripheral venous pres- ence in corneal parameters including keratometric and sure [1, 2]. The
International Ophthalmology – Springer Journals
Published: Jun 9, 2017
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