By Mohammad Wakeel Ansari, Ahmed Nadeem
This ebook is a pragmatic and concise atlas on ocular anatomy, with an emphasis on utilized elements and tricks for simple retention recommendations. The large colour illustrations and pictures encompass self-explanatory, particular, and significant representations of the issues lined within the textual content. protecting chapters reminiscent of bony socket of the attention, extraocular muscle tissues, eyelids, cornea and lens, and neurology of the attention, Atlas of Ocular Anatomy supplies a precis of the $64000 and proper issues for every subject, isolating out the basic from the nonessential components. whole with consultant schematic line diagrams and entire colour images, this atlas positive factors the correlation among anatomic proof with their possible scientific displays in ailment.
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Extra info for Atlas of Ocular Anatomy
That explains why our vision is termed binocular vision. For fusion to occur two retinal images have to be simultaneous, almost similar, and bifoveal (on each fovea). 11 2 Visual Pathway The cranial parts of each optic nerve join one another above the pituitary fossa to form a four-sided structure called the optic chiasma in which nasal ﬁbers from one side cross to the other side. The optic tract starts from the chiasma, which has 80 % visual ﬁbers and 20 % pupillary ﬁbers. Thus the optic tract of the right side has all the axons of the ganglion cells of the temporal half of the right retina and axons of ganglion cells of the nasal half of the left retina.
10 Iris shadow test for narrow angle of the anterior chamber Fig. 11 Imaginary posterior view of the ciliary body, zonule, lens, and ora serrata while sitting in vitreous Retina Ciliary processes Zonule Lens Edge of lens Pars plicata Pars plana Ora serrata lens helps to focus on a near object from which the incoming rays of light are divergent and need to be converged by increased curvature of the anterior pole of lens. This device in young people is called accommodation, which becomes weak in old people; if they want to read small letters they have to use reading glasses because their accommodation is poor.
6) on which the eyeball rests, enveloped by the Tenon capsule from limbus to optic nerve. The inner surface of the Tenon capsule is very smooth and acts like a capsule in which the eyeball rotates in various directions along its center of rotation, without being displaced in space. Thus whenever we talk of ocular motility, we mean rotation of the eye around the center of rotation along three axes and elevation and depression along a horizontal axis passing through center of rotation. The adduction and abduction occur along a vertical axis.