Is the black part in your eye a hole?!
Question: Yes, It is a hole. It determines how much light to let into our eyes. Thats why when it is dark, Your pupil gets bigger (It is letting more light in to see because it is dark). And when it is bright outside, your pupil gets smaller.
Answers: Yes, It is a hole. It determines how much light to let into our eyes. Thats why when it is dark, Your pupil gets bigger (It is letting more light in to see because it is dark). And when it is bright outside, your pupil gets smaller.
are you referring to the pupil?
in a sence, it is the pupil. Like a hole in a camera
The iris consists of pigmented fibrovascular tissue known as a stroma. The stroma connects a sphincter muscle (sphincter pupillae), which contracts the pupil, and a set of dilator muscles (dilator pupillae) which open it. The back surface is covered by an epithelial layer two cells thick (the iris pigment epithelium), but the front surface has no epithelium. The outer edge of the iris, known as the root, is attached to the sclera and the anterior ciliary body. The iris and ciliary body together are known as the anterior uvea. Just in front of the root of the iris is the region through which the aqueous humour constantly drains out of the eye, with the result that diseases of the iris often have important effects on intraocular pressure, and indirectly on vision. Depending on the amount of light, the iris makes the pupil larger or smaller.
The black part of your eye is called the pupil. It actually is a hole, though not like you might think. If you look at your eye in the mirror, you will see the white part that makes up the majority of the eye -- it's called the sclera. Then, you'll see a ring of colored tissue around the black hole -- this is called the iris. The iris can change size based on a number of different factors, such as light, excitation, drug use, etc. The size of the iris is changed based on pupillary muscles which are innervated by nerves of the autonomic nervous system. So, you'll see the size of the black hole, the pupil, change in size. Now, over the pupil and the iris, you'll see that there is a clear spheroidal surface. This is called the cornea, and it's the type of surface on which a contact lens might rest. The cornea is a specialized tissue for transmitting and focusing light (though you also have another lens inside the pupil for further refining the focus); like the rest of the sclera it is living tissue, but its blood supply is concentrated elsewhere in the sclera and it is thus translucent. Since the cornea covers the lens and the iris, the pupil is not actually a hole - it's not really a true opening that you might stick something through even though it is a hole that lets in variable amounts of light. Now, sometimes in surgeries and when medical professionals aspirate bits of the humors of the eye, you can actually insert a needle thru the cornea and the pupil. So, in this case, yes, it might be considered an artificially created hole. The needle might only pierce a small area of cells which can later grow together and heal.
Sorry - it's a bit of a complicated answer!