1 You have signs of infection, such as: 2  Increased pain, swelling, warmth, or redness around the bite. 3  Red streaks leading from the bite. 4  Pus draining from the bite.  A fever.
A negative index of refraction due to three-dimensional chirality is demonstrated for abilayered metamaterial based on pairs of mutually twisted planar metal patterns in parallel planes, which alsoshows negative electric and magnetic responses and exceptionally strong optical activity and circular dichro-ism.
It is the main refractive surface of the eye. 1  Primary refractive surface of the eye. 2  Index of refraction: n = 1.37. 3  Normally transparent and uniformly thick.  Nearly 1  avascular. Richly supplied with nerve fibers.  Sensitive to foreign bodies, cold air, chemical 1  irritation. Nutrition from aqueous humor  and.