the iris block the indiocorneal junction and the draining of aqueous humor is hampered.

glaucoma. the iris block the indiocorneal junction and the draining of aqueous humor is hampered. In wide angle glaucoma, the trabecular fibers lose their proper alignment so that pores are obliterated draining hampered. Narrow angle type produces very acute symptoms, very sharp rise of IOP and within 1 or 2 days, if no treatment be made, blindness can develop. In the wide angle variety, rise of IOP is moderate (say 35 mm Hg), patient may be symptom free in the beginning, and blindness is slow to appear. Treatment is to use pilocarpine (a parasympathomimetic agent) which constncts the pupil (= miosis), the angle is unblocked. This also realigns the trabecule filtration (draining) facilitated p blocked reduce the formation of aqueous humor and are also popular. As a corollary, the student should know, it is dangerous to use atropine (pupillary dilator = mydriatic) in a man prone to develop glaucoma (eg. men over 40 years) The crystalline lens. This structure is situaled in between the ms in front and vrtreous humor behind (fig.10B2.1.i). It is encased by a capsule which is suspended from the ciliary body by the suspensory ligament of fens (zonules, fig. 10B2. 1 .3). At their lateral ends the suspensory lgamenls are attached with the ciliary body. When the ciliary muscles contract, the tension of the suspensory ligament on the lens eases up and as a result the anterior surface of the lens bulges. The lens is made up of ribbon like transparent fibers arranged in concentric lamellae. During childhood the lens goes on adding layers on its outer surface until the adult size is reached at about 15th year. As age further advances the lens lose water and begins to become hard so that ability to bulge as stated in the preceding para, deteriorates.