PDF(Pubmed)
Abstract：
UNASSIGNED: To quantify the changes in dynamic visual acuity (DVA) and explain the hidden reasons after acute exposure to hypobaric hypoxia status.
UNASSIGNED: The study group comprised 18 healthy male and 15 healthy female participants aged 20-24 years old. DVA was measured with the self-developed software of Meidixin (Tianjin) Co., Ltd. Measurements were taken at eight altitudes. Data analysis was performed using the Kolmogorov-Smirnov test, paired sample T-test, and two-way repeated measures analysis of variance (ANOVA) for repeated measurements.
UNASSIGNED: At constant altitude, DVA showed an overall decreasing trend with increasing angular velocity and a fluctuating decrease at the vast majority of altitudes. At constant angular velocities, DVA gradually increased with altitude, with the most pronounced increase in DVA at altitude 5, and thereafter a gradual decrease in DVA as altitude increased. Finally, as altitude decreased, DVA increased again and reached a higher level at the end of the experiment, which was superior to the DVA in the initial state.
UNASSIGNED: Under a hypobaric hypoxic environment at high altitude, DVA was affected by the angular velocity and the degree of hypoxia, manifesting as an increase or decrease in DVA, which affects the pilot\'s observation of the display and control interfaces during the driving process, acquisition of information, and decision-making ability, which in turn may potentially jeopardize the safety of the flight.
UNASSIGNED: The study group comprised 18 healthy male and 15 healthy female participants aged 20-24 years old. DVA was measured with the self-developed software of Meidixin (Tianjin) Co., Ltd. Measurements were taken at eight altitudes. Data analysis was performed using the Kolmogorov-Smirnov test, paired sample T-test, and two-way repeated measures analysis of variance (ANOVA) for repeated measurements.
UNASSIGNED: At constant altitude, DVA showed an overall decreasing trend with increasing angular velocity and a fluctuating decrease at the vast majority of altitudes. At constant angular velocities, DVA gradually increased with altitude, with the most pronounced increase in DVA at altitude 5, and thereafter a gradual decrease in DVA as altitude increased. Finally, as altitude decreased, DVA increased again and reached a higher level at the end of the experiment, which was superior to the DVA in the initial state.
UNASSIGNED: Under a hypobaric hypoxic environment at high altitude, DVA was affected by the angular velocity and the degree of hypoxia, manifesting as an increase or decrease in DVA, which affects the pilot\'s observation of the display and control interfaces during the driving process, acquisition of information, and decision-making ability, which in turn may potentially jeopardize the safety of the flight.
摘要：
■量化动态视敏度（DVA）的变化，并解释急性暴露于低压低氧状态后的隐藏原因。
■研究组包括18名20-24岁的健康男性和15名健康女性参与者。DVA采用美地心(天津)有限公司自主开发的软件进行测量。Ltd.在八个海拔高度进行测量。数据分析采用Kolmogorov-Smirnov检验,配对样本T检验，以及用于重复测量的双向重复测量方差分析(ANOVA)。
■在恒定高度，随着角速度的增加，DVA总体上呈下降趋势，并且在绝大多数高度上呈波动下降趋势。在恒定的角速度下，DVA随海拔高度逐渐增加,在海拔5时DVA增加最明显，此后随着海拔增加DVA逐渐降低。最后,随着海拔高度的下降,DVA再次增加，并在实验结束时达到较高水平，优于初始状态的DVA。
■在高海拔的低压低氧环境下，DVA受角速度和缺氧程度的影响，表现为DVA的增加或减少，这会影响驾驶员在驾驶过程中对显示和控制界面的观察，获取信息,和决策能力，这反过来又可能危及飞行安全。
■研究组包括18名20-24岁的健康男性和15名健康女性参与者。DVA采用美地心(天津)有限公司自主开发的软件进行测量。Ltd.在八个海拔高度进行测量。数据分析采用Kolmogorov-Smirnov检验,配对样本T检验，以及用于重复测量的双向重复测量方差分析(ANOVA)。
■在恒定高度，随着角速度的增加，DVA总体上呈下降趋势，并且在绝大多数高度上呈波动下降趋势。在恒定的角速度下，DVA随海拔高度逐渐增加,在海拔5时DVA增加最明显，此后随着海拔增加DVA逐渐降低。最后,随着海拔高度的下降,DVA再次增加，并在实验结束时达到较高水平，优于初始状态的DVA。
■在高海拔的低压低氧环境下，DVA受角速度和缺氧程度的影响，表现为DVA的增加或减少，这会影响驾驶员在驾驶过程中对显示和控制界面的观察，获取信息,和决策能力，这反过来又可能危及飞行安全。
