Astigmatism is a very common vision problem. Despite having a somewhat scary-sounding name, astigmatism is not an eye disease — it's simply a refractive error like nearsightedness and farsightedness — and it can be corrected with eyeglasses, contact lenses and LASIK surgery. Astigmatism typica...
Redox balance is a must to maintaining resistant homeostasis and decreasing the severity of MS but the underlying systems are unclear yet. Herein, we tested the hypothesis that peroxynitrite, a representative molecule of reactive nitrogen species (RNS), could inhibit peripheral Treg cells, disrupt Tre...
Although some lenses are known to exhibit comatic aberration, most modern photographic lenses suffer more from other forms of aberration such asastigmatism, or have a combination of different aberrations. As a result, many photographers mistakenly label all non-circular shapes at the edges of the f...
Cyanobacteria evolved around 2.7 billion years ago and the fact that they are able to produce oxygen and fix carbon dioxide using energy from the sun–photosynthesis–is thought to have caused mass extinctions and the oldest known ice age. Related article: Bug Eyes: Tiny Glasses Confirm 3D ...
astigmatism / E5stIgmEtIzEm; E`stI^mE9tIzEm/ n [U] defect in an eye or a lens that prevents correct focusing (眼睛)散光, 乱视; (透镜)像散性, 像散现象. astigmatic / 9AstIg5mAtIk; 9AstI^`mAtIk/ adj. astir / E5st\:(r); E`st[/ adv, adj [pred 作表语] 1 in a state of ...