Eyepiece

[Sarah]

The lens, or combination of lenses, at the eye end of atelescope or other optical instrument, through which the image formedby the mirror or object glass is viewed. Collimating eyepiece. Seeunder Collimate.-- Negative, or Huyghenian, eyepiece, an eyepiece consisting of twoplano-convex lenses with their curved surfaces turned toward theobject glass, and separated from each other by about half the sum oftheir focal distances, the image viewed by the eye being formedbetween the two lenses. it was devised by Huyghens, who applied it tothe telescope. Campani applied it to the microscope, whence it issometimes called Campani's eyepiece.-- Positive eyepiece, an eyepiece consisting of two plano-convexlenses placed with their curved surfaces toward each other, andseparated by a distance somewhat less than the focal distance of theone nearest eye, the image of the object viewed being beyond bothlenses; -- called also, from the name of the inventor, Ramsden'seyepiece.-- terrestrial, or Erecting eyepiece, an eyepiece used in telescopesfor viewing terrestrial objects, consisting of three, or usuallyfour, lenses, so arranged as to present the image of the objectviewed in an erect position.

[Sarah]

Your eye...jamaican slang i guess...jamaican guy i know says it.

[Oralee]

the part of a piece of equipment, for example, a microscope , through which you look