The student's guide to diseases of the eye . gh the meshesof the ligamentum pectinatum (Fontanas spaces),which close the angle a; and it has been provedthat very little fluid can pass through any other partof the cornea. In glaucoma the angle a is nearlyalways closed, in recent cases by contact, in old casesby permanent cohesion, between the periphery of theiris and the cornea (Figs. 94 and 95). No completeexplanation of this advance of the iris has yet beengiven. Dr Adolf Weber holds that the ciliary pro-cesses becoming swollen from various causes, pushthe iris forwards and so start the glauc
The student's guide to diseases of the eye . gh the meshesof the ligamentum pectinatum (Fontanas spaces),which close the angle a; and it has been provedthat very little fluid can pass through any other partof the cornea. In glaucoma the angle a is nearlyalways closed, in recent cases by contact, in old casesby permanent cohesion, between the periphery of theiris and the cornea (Figs. 94 and 95). No completeexplanation of this advance of the iris has yet beengiven. Dr Adolf Weber holds that the ciliary pro-cesses becoming swollen from various causes, pushthe iris forwards and so start the glaucomatousstate. Priestly Smith believes the primary obstruc-tion to depend upon narrowing, or even obliteration,of the circular chink ( circumlental space) betweenthe edge of the lens and the tips of the ciliary pro-cesses, and that this proceeds mainly from a pro-gressive increase in the size of the lens which occurs 246 GLAUCOMA in old age ;* obstruction of this space leads to rise ofpressure in the vitreous, followed by advance of the lens. Fig. 94.—Ciliary region from a case of acute glaucoma of onemonths duration. (1 and 2, situations of iridectomywounds in two cases.) x 10. and ciliary processes, pressure on the iris, and closureof the angle; swelling of the ciliary processes wouldbe a contributory cause. Brailey holds that a chronic
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