Corneal topography is an indispensable tool and plays a critical role in the practice of refractive surgery. In corneal refractive surgery, corneal topography is used preoperatively to detect ...

In corneal refractive surgery, corneal topography is used preoperatively to detect irregular astigmatism, ectatic corneal disorders, or other abnormalities, and to monitor topographic stability ...

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The placido-disk topography systems are based on the reflection principle. A placido disk is projected onto the cornea and the images of the placido disk reflected off the cornea are captured ...

AIMS To quantitatively evaluate the changes in corneal irregular astigmatism after laser in situ keratomileusis (LASIK) in relation to the amount of laser ablation. METHODS In 189 eyes of 116 patients ...

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Keratoconus (KCN) is an eye condition that affects the cornea. The main objective of this study is to evaluate the accuracy of keratoconus detection from corneal parameters including elevation, ...

The elevation of the ocean surface has been measured for over two decades from spaceborne altimeters. However, existing altimeter measurements are not adequate to characterize the dynamic variations ...

Results: For bilateral data analysis, the magnitude of corneal astigmatism significantly increased from 0.66 ± 0.39 D preoperatively to 0.74 ± 0.46 D postoperatively (paired t -test, p = 0.012). The M ...

But at a local scale, some areas can be somewhat more favorable than others due to topography. For example, we’ve seen a few examples of tornadoes impacting near Pikes Peak in Colorado in recent years ...

Laser refractive surgery has long been a life-changing option for those struggling with nearsightedness, farsightedness, or astigmatism. Millions have said goodbye to glasses and contact lenses thanks ...