2025年3月16日 · The corneal q value provides information about the asphericity of the cornea, which is the deviation of its shape from a perfect sphere. It is used to assess the optical quality …

2024年8月30日 · Corneal Q value is a commonly used term to characterise the asphericity of the cornea and is a critical parameter in describing the eye model. Researchers in the past have …

2017年5月18日 · The results included the mean corneal Q values (mean ± SD) of the anterior and posterior surfaces at different aperture diameters, the Q value distributions of the anterior and …

2020年4月20日 · Q-val: Describes the corneal shape factor, or eccentricity of the cornea. The ideal value is -0.26. More negative values may suggest keratoconus or hyperopic correction …

2025年3月16日 · Corneal asphericity Q-value is a measure of the curvature of the cornea, which plays a crucial role in vision and eye health. The Q-value of the cornea affects the quality of …

We revealed that eyes with lens decentration had much higher corneal asphericity (Q-value) differences between the nasal–temporal and superior–inferior quadrants than eyes without …

Q value of 25° had high correlation (r=0.673, P=0.000) with corneal spherical aberration, but low correlation (r=0.241, P=0.016) with total spherical aberration. “Q值”来表示。 大多数人的角膜 …

2017年5月18日 · The corneal Q values of anterior and posterior surfaces were measured at 3.0, 5.0 and 7.0mm aperture diameters using Bausch & Lomb Orbscan IIz (software version 3.12). …

The corneal asphericity coefficient (Q value) describes the rate of radial curvature variation of the corneal quadric surface from its center to the periphery. It is a quantitative topographic …

MORE AIM：To investigate the corneal Q value of asphericity distribution in myopic patients. METHODS： 106 myopic eyes （53 cases） were divided into three groups including low …