生理学接角的比较分析 基于对视线位置的客观测量进行的角度计算
Linda Krauze1, Karola Panke1, Gunta Krumina1
1Department of Optometry and Vision Science, Faculty of Science and Technology, University of Latvia, Jelgavas Street 1, LV-1004 Riga, Latvia.
Sensors (Basel, Switzerland)
|January 8, 2025
概括
来自PowerRef 3的奇特光折射学凝视测量显示了偏移. 校准方法,特别是线性回归,显著提高了生理角计算的准确性.
科学领域:
- 眼科医生 眼科 眼科
- 眼镜测量是指眼睛的测量.
- 生物医学工程 生物医学工程
背景情况:
- 奇特的光折射计测量眼睛的折射,住宿,凝视和瞳孔大小.
- 在像PowerRef 3这样的设备中,对视线测量的个别校准尚不发达.
- 现有的PowerRef 3注视数据显示,与预期的位置有显著差异.
研究的目的:
- 开发和评估用于校准PowerRef 3的凝视测量的方法.
- 使用视觉接数据计算生理接角.
- 为了提高异常光折射学中凝视位置测量的准确性.
主要方法:
- 为PowerRef 3的视觉接数据提出了两种校准方法 (卡帕角度和线性回归).
- 23名参与者在不同距离 (25厘米至600厘米) 观看刺激.
- 预期的角是使用远处的单个瞳孔间距离来计算的.
主要成果:
- 原始PowerRef 3数据显示出与预期的角 (例如,在25厘米处9.64°) 的显著偏差.
- 卡帕角度校准将差异减少到25厘米处的3.93°和600厘米处的3.70°.
- 线性回归校准进一步提高了精度,在25厘米处达到3.30°,在600厘米处达到0.26°.
结论:
- 两种拟议的校准方法都提高了PowerRef 3视线测量的准确性.
- 线性回归校准为计算生理接角提供了卓越的准确性.
- 精确的凝视测量校准对于推进异常光折射测量应用至关重要.
相关概念视频
Relative Motion Analysis - Velocity
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
Relative Motion Analysis using Rotating Axes
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it instrumental in...
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it instrumental in...
Relative Motion Analysis using Rotating Axes-Problem Solving
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
Here, in order to determine the magnitude of velocity and acceleration for point...
Relative Motion Analysis - Acceleration
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
Relative Motion Analysis using Rotating Axes - Acceleration
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
Time differentiation is...
Unsymmetric Bending - Angle of Neutral Axis
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal centroidal axes. The...
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal centroidal axes. The...


