Collimating eyepiece. See under Collimate.Negative, or Huyghenian, eyepiece, an eyepiece consisting of two plano-convex lenses with their curved surfaces turned toward the object glass, and separated from each other by about half the sum of their focal distances, the image viewed by the eye being formed between the two lenses. it was devised by Huyghens, who applied it to the telescope. Campani applied it to the microscope, whence it is sometimes called Campani's eyepiece.Positive eyepiece, an eyepiece consisting of two plano-convex lenses placed with their curved surfaces toward each other, and separated by a distance somewhat less than the focal distance of the one nearest eye, the image of the object viewed being beyond both lenses; — called also, from the name of the inventor, Ramsden's eyepiece.terrestrial, or Erecting eyepiece, an eyepiece used in telescopes for viewing terrestrial objects, consisting of three, or usually four, lenses, so arranged as to present the image of the object viewed in an erect position.

Eyer
(Ey"er) n. One who eyes another. Gayton.

Eyereach
(Eye"reach`) n. The range or reach of the eye; eyeshot. "A seat in eyereach of him." B. Jonson.

Eye-saint
(Eye"-saint`) n. An object of interest to the eye; one worshiped with the eyes. [Obs.]

That's the eye-saint, I know,
Among young gallants.
Beau. & Fl.

Eyesalve
(Eye"salve`) n. Ointment for the eye.

Eyeservant
(Eye"serv`ant) n. A servant who attends faithfully to his duty only when watched.

Eyeservice
(Eye"serv`ice) n. Service performed only under inspection, or the eye of an employer.

Not with eyeservice, as menpleasers.
Col. iii. 22.

Eyeshot
(Eye"shot`) n. Range, reach, or glance of the eye; view; sight; as, to be out of eyeshot. Dryden.

Eyesight
(Eye"sight`) n. Sight of the eye; the sense of seeing; view; observation.

Josephus sets this down from his own eyesight.
Bp. Wilkins.

Eyesore
(Eye"sore`) n. Something offensive to the eye or sight; a blemish.

Mordecai was an eyesore to Haman.
L'Estrange.

Eye-splice
(Eye"-splice`) n. (Naut.) A splice formed by bending a rope's end back, and fastening it into the rope, forming a loop or eye. See Illust. under Splice.

Eye-spot
(Eye"-spot`) n. (Zoöl.) (a) A simple visual organ found in many invertebrates, consisting of pigment cells covering a sensory nerve termination. (b) An eyelike spot of color.

Eye-spotted
(Eye"-spot`ted) a. Marked with spots like eyes.

Juno's bird, in her eye-spotted train.
Spenser.

Eyelid
(Eye`lid") n. (Anat.) The cover of the eye; that portion of movable skin with which an animal covers or uncovers the eyeball at pleasure.

Eyen
(Ey"en) n. pl. Eyes. [Obs.] Chaucer. Spenser.

Eyepiece
(Eye"piece`) n. (Opt.) The lens, or combination of lenses, at the eye end of a telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed.


  By PanEris using Melati.

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