2022年5月1日 · “Prior tomographic or topographic imaging is the most helpful, but even old glasses prescriptions or notes that include manual keratometry or other refractive …

2020年4月20日 · Irregular astigmatism: nonuniform steepening that cannot be corrected by cylindrical lens (BCVA of 20/50 or worse due to irregular astigmatism). Expected topography: …

Irregular astigmatism may have specific features at topography or have an undefined pattern. Specific features include keratoconus, pellucid marginal degeneration, decentered ablation, …

Causes of Irregular Astigmatism -gone Health in New York City. Innate astigmatism is usually due to congenital corneal pathology that can either be stable or progressive, and acquired …

2016年4月1日 · Corneal topography is more useful in making the diagnosis of irregular astigmatism, as a keratometer measures only a small area of the central cornea, so off-axis …

2025年1月15日 · Corneal ectasia is a progressive degeneration that entails corneal protrusion, irregular astigmatism, and corneal thinning. 1 Laser-assisted in situ keratomileusis (LASIK) …

2019年6月1日 · Our results suggest that topography-guided ablation is safe and effective in reducing corneal irregularities and high astigmatism, leading to improved visual acuity in 2/3 of …

2013年6月1日 · Corneal topography and corneal tomography often provide the best overall assessment of the corneal status and degree of astigmatism, irregularity and symmetry. These …

2015年7月1日 · Corneal topography is a noninvasive medical imaging technique that scans the cornea to show any astigmatism or any irregularities on its surface. “It’s like giving you a …

2020年2月2日 · Corneal topography can detect corneal regular astigmatism, corneal irregular astigmatism (higher-order aberrations [HOAs]) including spherical aberration, and corneal …