eyecup

NOUN

(embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina
a small vessel with a rim curved to fit the orbit of the eye; use to apply medicated or cleansing solution to the eyeball
an eyecup is called an eyebath in Britain

How To Use eyecup In A Sentence

This is a long eye relief binocular, and by rolling down the eyecups, eyeglass wearers can truly obtain a full field of view.
It also has fold-down eyecups for those who wear eyeglasses.
Adjustable eyecups work just as well for folks with glasses.
Then there are the little touches that demonstrate the top level of user-friendly engineering: indentations on the body armor that fit the thumbs for a comfortable hold; tight checkering on the center focus knob for a better touch; extremely fine focus for close and far; and rounded eyecup rims that nestle against the eye sockets. Best New Binocular 2009: Kowa Genesis 33 8x33
They feature fully multi-coated lenses and L-coated prisms, twist-up eyecups and are completely waterproof and have shock-absorbing rubber armor.
The monocular produced a very bright, clear image, however, and we assume the binocular model of the same power, which does have eyecups, would too.
Eyeglass wearers will enjoy the extra-long eye relief of these optics with their rubber eyecups.
The eyecup is even vented so it doesn't suck out your eyeball.
Do not use an eyecup, eye drops, or ointment unless the poison center instructs you to do so.
By grafting in another eyecup another lens can be induced to form from the overlying layer.