There is a central depression, of variable size, called the optic cup.

Lens pits and optic cups form the start of the developing eye.

Iris is formed from the optic cup cells.

The cupula optica, or optic cup, in embryological development of the eye.

The optic cup also produces the iris sphincter and dilator muscles.

The optic cup is the white, cup-like area in the center of the optic disc.

The eye field gives rise to the optic vesicle and then to the optic cup.

The iris develops from the anterior two layers of an embryonic neuroectoderm structure called the optic cup.

Obliteration of the optic cup.

Despite their very different functions and histological appearances, these regions have a common origin from the two layers of the embryological optic cup.

Optic cup may refer to:

A central core of white glial tissue occupies the position of the normal optic cup, causing a white mass.

Optic cup (embryology)

The optic cup then delaminates into two layers: The neural retina and the retinal pigment epithelium.

The fgf8 mRNA becomes localized in what differentiates into the neural retina of the optic cup.

After the migrating mesenchymal cells reach the anterior margin of the developing optic cup they must form the tissues of the iridocorneal angle.

By E16.5 the anterior margin of the optic cup had extended more anteriorly but no obvious differentiation into the iris and ciliary body had occurred.

These are not derived from the neural crest, instead an outpouching of the neural tube generates the optic cup which, in turn, forms the retina.

The ratio of the size of the optic cup to the optic disc (or cup-to-disc ratio) is measured to diagnose glaucoma.

Invagination of the optic vesicle to form the optic cup occurs around E10, as the lens vesicle is developing [ 22].

In the past, scientists have gotten animals like amphibians to grow eyes on various parts of their body by transplanting the entire embryonic optic cup from one spot to another.

The optic disc originates from the optic cup when the optic vesicle invaginates and forms an embryonic fissure (or groove).

Shortly after the stalk of the lens vesicle disappears at E10.5, a few undifferentiated mesenchymal cells were present adjacent to the anterior margin of the optic cup.

Briefly, in mice, migrating mesenchyme begins to fill the space between the anterior edge of the optic cup, the surface ectoderm and the lens vesicle at E11 to E12.

The lens acts as an inducer back to the optic vesicle to transform it into the optic cup and back to the ectoderm to transform it into the cornea.

A wide rubber ring on the eyepiece cup protects perfectly from hurts even using heavy calibers.

Some manufacturers use 'BA' to mean that the binoculars are rubber-covered and have fold-down eyepiece cups.

It does not have a rubber eyecup like the 30mm model.

A rubber eyecup also allows others to use the camera as well as yourself.

At the same time as the eyecup approaches the sheet of cells covering the head region the lens begins to develop.

Herbal Therapies - Using an eyecup, wash the eye several times a day with a recommended solution.

The eyepiece has a detachable soft rubber eyecup.

The lens forms at precisely the spot where the outgrowth of the eye, in the form of an eyecup, approaches the surface.

He scratched at one eyecup. '

By grafting in another eyecup another lens can be induced to form from the overlying layer.

Fashionable, general purpose safety spectacle with close eyecup fit, feature distortion free medium impact polycarbonate lens.

He also uses a Hoodman Eyecup on his camera, which moves his face back enough to provide a margin of safety.

If you wear glasses when using your SLR, we recommend using a rubber eyecup.

Egon Zimmerman," Pavlik said, his right eye now pressed against the eyecup on the telescopic sight. "

The F-1s eyepiece was threaded and could take a metal (later soft rubber covered) ring, an eyecup or several different diopter adjustment lenses.

American cameraman Ira Raider thought so to, so he designed an eyecup that was big enough so you didn't need to.

Raise the camcorder and rest it against your face so that the viewfinder eyecup is just in contact and the finder picture can be clearly seen.

A flexible disc or eyecup may be used; in addition, a piece of material may be fitted to restrict the vision of the disengaged eye.

Pros and Cons The soft eyecup around the viewfinder is nice it can be removed to slip on the strap-mounted blind for tripod shots.

Other accessories from Leica include a rubber eyecup, right-angle finder, diopter correction lenses, cases, straps, tripods, cable releases etc.

The study, which came to be called the Smoked Drum Experiment, involved an eyecup made of plaster-of-Paris, to which was attached a light stick or straw.

Featuring a contoured eyecup to prevent distractions and a convenient tripod-mount for steady and comfortable nocturnal observations, like surveillance and wildlife viewing.

He designed his own eyecup big enough for glasses (and this applies to sunglasses too), and as a bonus provides a shade from the sun for the eyepiece.

As with all Meade eyepieces, all the optical elements are fully multicoated, the inner end is threaded to accept filters, and a foldable rubber eyecup is included.

The eye has two different origins: the eyecup that forms the retina is an outgrowth from the brain, while the lens comes from the sheet of cells covering the embryo.

Cameras mounted in the carapace of the firefly brought her a view through her laser eyecup of what the firefly was seeing, as if she were swimming alongside it.

Its professional version, the HVR-A1, added a second accessory shoe in place of the flash, XLR audio inputs, additional recording options, larger eyecup and larger lens hood.

It can also be most soothing when used in an eyebath.

If her answers are right, we postpone the eyebath.

Inside were medical appliances, two medicine glasses, eyebath, eye dropper and a few labelled bottles.

A little later the thought broke through that I might have earned a hydrochloric eyebath with my moans and pleas, but there was nothing I could do about that now, though as I regained some control I suppressed the audibilizations.

At the same time as the eyecup approaches the sheet of cells covering the head region the lens begins to develop.

He scratched at one eyecup.

By grafting in another eyecup another lens can be induced to form from the overlying layer.

The lens forms at precisely the spot where the outgrowth of the eye, in the form of an eyecup, approaches the surface.

Raise the camcorder and rest it against your face so that the viewfinder eyecup is just in contact and the finder picture can be clearly seen.

The F-1s eyepiece was threaded and could take a metal (later soft rubber covered) ring, an eyecup or several different diopter adjustment lenses.

"Egon Zimmerman," Pavlik said, his right eye now pressed against the eyecup on the telescopic sight.

Other accessories from Leica include a rubber eyecup, right-angle finder, diopter correction lenses, cases, straps, tripods, cable releases etc.

The eye has two different origins: the eyecup that forms the retina is an outgrowth from the brain, while the lens comes from the sheet of cells covering the embryo.

Cameras mounted in the carapace of the firefly brought her a view through her laser eyecup of what the firefly was seeing, as if she were swimming alongside it.

Its professional version, the HVR-A1, added a second accessory shoe in place of the flash, XLR audio inputs, additional recording options, larger eyecup and larger lens hood.

In mantis shrimps the movement of the stalked eye is unusually free, and can be driven in all possible axes, up to at least 70 , of movement by eight individual eyecup muscles divided into six functional groups.

This coordination of two developmental events, crucial to the formation of the eye, is achieved in some animals by the approaching eyecup inducing the lens to develop just where it touches the surface, and so the lens develops at the right place.

Except for a few stray wisps, her curly blond hair was hidden under a black watch cap, her cheeks were flushed with the cold and her fight eye was pressed snug into the PSO-I's robber eyecup.