Ischemic optic neuropathy (ION) is damage to the optic nerve caused by ischemia and hypoxia of the optic nerve due to an impairment of the blood supply to the optic nerve from the arteries. Obstructive Sleep Apnea Hypoventilation Syndrome (OSAHS) is a sleep-breathing disorder characterized by recurrent upper airway obstruction and apnea during sleep, leading to recurrent intermittent hypoxemia with fragmented sleep and daytime sleepiness. Due to the lack of accurate methods to evaluate blood flow, the correlation between the two is unclear and uncertain. The study will enroll 80 patients from the First Affiliated Hospital of Nanjing Medical University and categorize them into mild, moderate, and severe OSA groups according to their apnea-hypopnea index (AHI). Participants will undergo a baseline evaluation, including polysomnography (PSG) and ophthalmologic examinations such as optic nerve and macular blood flow OCT, visual acuity, refraction, intraocular pressure, and visual fields. Eligible patients will be treated with CPAP for 3 months, after which their PSG and ophthalmologic examination-related results will be re-evaluated to assess treatment efficacy.
Age range
18 Years – 80 Years
Sex
ALL
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Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Optic nerve and macular blood flow
Timeframe: Baseline and 3 months of CPAP therapy
Apnea Hypopnea Index (AHI)
Timeframe: Baseline and 3 months of CPAP therapy
Hypoxic Burden（HB）
Timeframe: Baseline and 3 months of CPAP therapy
Ventilatory burden
Timeframe: Baseline and 3 months of CPAP therapy
Blood pressure variability
Timeframe: Baseline and 3 months of CPAP therapy
Heart rate variability
Timeframe: Baseline and 3 months of CPAP therapy
Pulse Wave Amplitude Drops Index
Timeframe: Baseline and 3 months of CPAP therapy