Earwigs eat aphids and several other harmful pests as well as hosta leaves. Some gardeners put up with the damage and leave the earwigs in the garden to control other pests. You can control earwigs with traps. Place a piece of crumpled paper under a flowerpot or use a tube of paper or bamboo as a trap.
In optics, refraction is a phenomenon that often occurs when waves travel from a medium with a given refractive index to a medium with another at an oblique angle. At the boundary between the media, the wave's phase velocity is altered, usually causing a change in direction.
Refraction is the process of determining the glasses prescription to correct the near-sighted or far-sighted condition.See Optics for an explanation of the terms near-sighted, far-sighted, astigmatism and presbyopia.he main distance categories are shown above, with the colors matching the diagrammatic glasses shown next. 1  Reading and close work are usually done around 14 inches. 2  Think of intermediate as armâs length, usually 18 to 24 inches, where a lot of lifeâs activities occur. 3  The computer. 4  Room distance.