Keratoconus occurs when this cornea becomes thinner and protrudes in a conical shape. This alteration in the cornea's form ...

Astigmatism occurs when the cornea or lens has an irregular curvature, making it harder for light to focus correctly on the retina. Doctors don't know exactly why the shape of the cornea or lens ...

All procedures were unsuccessful, resulting in aggressive recurrences of pterygial mass and symblepharon, extraocular movement limitation, corneal astigmatism, and decreased visual acuity. Ultimately, ...

This valuable study builds on previous work by the authors by presenting a potentially key method for correcting optical aberrations in GRIN lens-based micro endoscopes used for imaging deep brain ...

The best lenses for astrophotography are arguably the most important tools in your arsenal for getting clear, sharp images of the night sky. An astro lens needs to offer a wide-angle perspective, not ...

"The one thing missing here is the need for this, and also the court itself said that this was procedurally irregular, and one would think that having come to the conclusion ... the court would be ...

Immigration is a highly sensitive topic in most of the bloc's 27 member states, even though irregular migrants arriving in Europe last year were a third of the 1 million seen during the crisis in ...

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Toric IOLs enable a lens-based surgical approach to the treatment of astigmatism. Although the lens may cause some of the eye's astigmatism, this is removed at the time of cataract surgery ...

Other potential drawbacks of incisional keratotomy include risk of perforation, infection, unpredictability of result, creation of irregular astigmatism, and disruption of the ocular surface.