Hadith 1

it and connects. The rest is in the membrane of the liver, the spleen and the rest of the viscera, and there are some parts of the third pair connected to it. The seventh starts from the back of the brain, where the medulla originates and disperses into the muscles of the tongue and larynx, and the muscles that move the organs of the body. All of them arise from these nerves and the spinal nerves mentioned above. And since it is not possible to visualize it with words, what is possible from imaging the nerves and bones, but rather it must be seen, and there are many great insights that we have turned away from; and the number of all the muscles in the body is five hundred and twenty-nine, according to Galen’s opinion. As for the eye, it is composed of seven layers and three moistures, except for nerves, muscles, and veins, and its structure is explained that the hollow nerve, which is the first nerve leaving the brain, exiting from the cranium to where the bottom of the eye is, and on it are two membranes, the membranes of the brain. If it protrudes from the cranium and becomes in the area around the bone of the eye, the thick membrane separates from it and becomes a covering and covering over the entire upper eye bone, and this membrane is called the hard layer, and the thin membrane also separates from it. It becomes a membrane and cloth without the solid layer, and it is called the placental layer because of its resemblance to the placenta; and the nerve presents itself, and a membrane comes in it without these two, and it is called the reticular layer. Then a soft, moist, red, clear, thick body, like molten glass, is formed in the middle of this membrane, which is called vitreous moisture, and another round body is formed in the middle of this body, except that it has the slightest bulge, similar to ice in its purity, and it is called glacial moisture. The glass surrounds the skin by half, and on top of the other half is a cobweb-like body with a very clear and glaze called the arachnoid layer. Then this body is topped by a liquid in the colour of egg white called the oocyte, and above the oval moisture is a thin, velvety body inside, where the oval is smooth on the outside, and its colour varies in the bodies. Perhaps it was very black, and perhaps it was less than that in the middle, such that a hole was adjacent to the skin, which widened and narrowed in an unavoidable way to the extent of the skin’s need for light, and it is like the hole of grapes extracted from the cluster, which is the pupil, and it contains sweet moisture and spirit, and for this reason the beholder is nullified at death, and this membrane is called the uveal layer. This layer is topped and covered by a thick, clear, solid body that resembles a thin solid sheet of white horn called the cornea. However, it is coloured in the colour of the layer under which it is called blueberry, as it sticks something of a colour behind a bowl of glass. So that place of the glass tends to the colour of that thing, and it rises and covers it, but not all of it, but rather to the place of the darkening of the eye, white, creamy, transparent flesh mixed with the muscles that move the eye, thick and fused to it. It is called the conjunctiva, which is the white of the eye and arises from the membrane that is on the cranium from outside. The cornea also arises from the hard layer, the uvea of the choroid and the arachnoid layer of the retina, and each attracts food from its origin, so it nourishes its share and leads the rest to it. And the colours of the eyes, given the different colours of the blue layer, are four kohl, blue, Shahla, and Sha’la. The reason for the kohl is either the lack of the soul and its lack of radiance on all parts of the eye, or its roundness, and the lack of radiance on the colour of the blueberry, or the smallness of the skin or its hollowness, and being very inside, so its