Text-book of ophthalmology . a!sheath, ///. and the adjoining arachnoid sheath, nr, an- separated from the nerve, especially at its tem-poral sid •. and the intervaginal -pace, v r, is consequently dilated. On the other hand, the pial sheath,i> he- in -i 9e apposition to the nerve. 872 TEXT-BOOK OF OPHTHALMOLOGY occurs when the pupil is dilated, the iris is pushed against the cornea, and the sinus ofthe anterior chamber is thus shut off (see page 506). Obviously the more prominentthe ciliary process and the narrower the sinus of the anterior chamber the morereadily will this result take pla
Text-book of ophthalmology . a!sheath, ///. and the adjoining arachnoid sheath, nr, an- separated from the nerve, especially at its tem-poral sid •. and the intervaginal -pace, v r, is consequently dilated. On the other hand, the pial sheath,i> he- in -i 9e apposition to the nerve. 872 TEXT-BOOK OF OPHTHALMOLOGY occurs when the pupil is dilated, the iris is pushed against the cornea, and the sinus ofthe anterior chamber is thus shut off (see page 506). Obviously the more prominentthe ciliary process and the narrower the sinus of the anterior chamber the morereadily will this result take place. In this fact is probably contained, at least in part,the reason why hypermetropic eyes are very frequently, and myopic eyes, on the con-trary, are very rarely indeed, attacked by inflammatory glaucoma. [But see page 496.]The ophthalmoscopic and anatomical changes which make their appearance inthe higher grades of myopia render it evident why the visual acuity is almost neverfound to be normal in very marked Fig. 382.—Ciliary Body of an Emmetropic Eye.
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