STUDY OBJECTIVES: The aim of this study was to evaluate the integrity of the visual system in patients affected by obstructive sleep apnea (OSA) by means of electroretinogram (ERG) and visual evoked potential (VEP). METHODS: We performed electrophysiological study of the visual system in a population of severe OSA (apnea-hypopnea events/time in bed ≥ 30/h) patients without medical comorbidities compared to a group of healthy controls similar for age, sex, and body mass index. Patients and controls did not have visual impairment or systemic disorders with known influence on the visual system. ERG and VEP were elicited by a reversal pattern generated on a television monitor at low (55') and high (15') spatial frequencies stimulation. Daytime sleepiness was assessed using the Epworth Sleepiness Scale (ESS) in both patients and controls. RESULTS: In comparison with healthy controls (n = 27), patients with OSA (n = 27) showed a significant latency delay coupled with a significant amplitude reduction of P100 wave of VEP at all spatial frequencies in both eyes. No significant differences between groups were detected as concerning ERG components. No correlations were found between polygraphic parameters, ESS scores, or VEP and ERG components in OSA patients. CONCLUSIONS: This study documented that patients with OSA, without medical comorbidities, present VEP alteration as documented by lower amplitude and longer latency of the P100 component than healthy controls. These altered electrophysiological findings may be the expression of optic nerve dysfunction provoked by hypoxia, acidosis, hypercarbia and airway obstruction, frequently observed in patients with OSA. Hence, we hypothesize that OSA per se may impair optic nerve function.
STUDY OBJECTIVES: The aim of this study was to evaluate the integrity of the visual system in patients affected by obstructive sleep apnea (OSA) by means of electroretinogram (ERG) and visual evoked potential (VEP). METHODS: We performed electrophysiological study of the visual system in a population of severe OSA (apnea-hypopnea events/time in bed ≥ 30/h) patients without medical comorbidities compared to a group of healthy controls similar for age, sex, and body mass index. Patients and controls did not have visual impairment or systemic disorders with known influence on the visual system. ERG and VEP were elicited by a reversal pattern generated on a television monitor at low (55') and high (15') spatial frequencies stimulation. Daytime sleepiness was assessed using the Epworth Sleepiness Scale (ESS) in both patients and controls. RESULTS: In comparison with healthy controls (n = 27), patients with OSA (n = 27) showed a significant latency delay coupled with a significant amplitude reduction of P100 wave of VEP at all spatial frequencies in both eyes. No significant differences between groups were detected as concerning ERG components. No correlations were found between polygraphic parameters, ESS scores, or VEP and ERG components in OSA patients. CONCLUSIONS: This study documented that patients with OSA, without medical comorbidities, present VEP alteration as documented by lower amplitude and longer latency of the P100 component than healthy controls. These altered electrophysiological findings may be the expression of optic nerve dysfunction provoked by hypoxia, acidosis, hypercarbia and airway obstruction, frequently observed in patients with OSA. Hence, we hypothesize that OSA per se may impair optic nerve function.
Authors: V Parisi; F Pierelli; A Malandrini; P Carrera; D Olzi; D Gregori; R Restuccia; L Parisi; F Fattapposta Journal: Clin Neurophysiol Date: 2000-09 Impact factor: 3.708
Authors: Daniel S Mojon; Thomas R Hedges; Bruce Ehrenberg; Emely Z Karam; David Goldblum; Alex Abou-Chebl; Matthias Gugger; Johannes Mathis Journal: Arch Ophthalmol Date: 2002-05
Authors: Daniel S Mojon; Christian W Hess; David Goldblum; Matthias Boehnke; Fritz Koerner; Matthias Gugger; Claudio Bassetti; Johannes Mathis Journal: Ophthalmologica Date: 2002 May-Jun Impact factor: 3.250
Authors: C Liguori; L Ferini-Strambi; F Izzi; L Mari; N Manfredi; A D'Elia; N B Mercuri; F Placidi Journal: Br J Clin Pharmacol Date: 2018-10-24 Impact factor: 4.335
Authors: Katherine A Bussan; Whitney L Stuard; Natalia Mussi; Won Lee; Jess T Whitson; Yacine Issioui; Ashley A Rowe; Katherine J Wert; Danielle M Robertson Journal: PLoS One Date: 2022-06-30 Impact factor: 3.752