SAN FRANCISCO — Corneal topographic astigmatism correlates with manifest refractive cylinder at the corneal plane more closely than other metrics, according to a study presented here.

This patient’s topographic astigmatism went from 1.68D @ 71° preop to 0.39D @ 57° postop, which is a 77% decrease in corneal cylinder. After surgery, this patient’s refraction improved from ...

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Astigmatism can be diagnosed as part of a comprehensive optometric examination, which also tests for many other ocular conditions. There are several components of this examination, which measures: ...

For 4.5–7 D of astigmatism, we utilize a combined approach with PCRIs and toric IOLs. Finally, non-FDA approved high-power toric IOLs available in Europe and elsewhere may be implanted.

At 3 months follow-up in eyes randomized between myopic PRK and myopic LASIK, Manche and Haw [38] found that cylinder had decreased from +0.85 to +0.25 D for PRK and +0.74 to 0.19 D for LASIK.

Astigmatism often makes your eyesight fuzzy both at a distance and up close. You can look at letters on a chart to see how sharp your vision is. Online tests often use the “Tumbling E” method.

The preoperative refractive cylinder was significantly correlated with the 3-month post-op sphere and astigmatism (R2 =0.04, P =0.01 and R2 =0.18, P =0.001, respectively).

The cornea is usually round like a sphere, but people with astigmatism have oval-shaped corneas. This shape changes how light rays enter the eye, leading to blurred vision.

Most eyes (97.7%) with astigmatism showed WTR astigmatism (axis 75 o –105 o) with the mean plus cylinder axis at 89.30±7.24 o, and <3% had oblique astigmatism (axis 16 o –74 o and 106 o ...

Holiday lights, like those people decorate their homes with for Christmas, may negatively impact people with astigmatism and their ability to see clearly while driving. This is largely due to ...