Text-book of ophthalmology . then be used. (If thereis a suspicion of glaucoma, the homatropinemay be replaced by euphthalmine or evencocaine. In that case if increase of tensionoccurs with the dilatation, this can easily becontrolled by eserine, and if, on the otherhand, the euphthalmine or cocaine fails to act,they can at once be replaced by homatropine.)If one instillation of a 2-per-cent solution ofhomatropine combined with 4-per-cent cocainefails to dilate the pupil in twenty minutes,repeated instillations should be made until thepupil does dilate, or it is evident that it willnot do so.
Text-book of ophthalmology . then be used. (If thereis a suspicion of glaucoma, the homatropinemay be replaced by euphthalmine or evencocaine. In that case if increase of tensionoccurs with the dilatation, this can easily becontrolled by eserine, and if, on the otherhand, the euphthalmine or cocaine fails to act,they can at once be replaced by homatropine.)If one instillation of a 2-per-cent solution ofhomatropine combined with 4-per-cent cocainefails to dilate the pupil in twenty minutes,repeated instillations should be made until thepupil does dilate, or it is evident that it willnot do so. In the latter case atropine shouldbe instilled at once. If under either homatro-pine or atropine the pupil dilates sluggishly,imperfectly or unevenly and if, furthermore,when the dilatation is finally effected the painand photophobia are relieved, the diagnosis ofiritis is confirmed. Adrenaline helps, too, bydispelling a superficial injection and so bring-ing to view a deep injection which the drugdoes not much reduce.—D.]. Fig. 164.—Iritis. Magnified 116 X 1. Upon the surface of the iris is a layer ofexudate, E, consisting mainly of a fine net-work of coagulated fibrin, in which lie scat-tered pus corpuscles. The iris, i, is bounded 337. Exudation takes place partly &ffi,X&M£*Ju2fe£ZiAinto the tissue of the iris itself, partly T^M^ZoVSti^^l^Vt blood-vessels, b, with very developed adven-titia, and a great quantity of pigmented cells(the specimen is taken from a dark-browniris). Most of these (chromatophores) stillretain their elongated and branching shape,but others, at k, are transformed into shape-less agglomerations of pigment, as is usuallythe case in inflammation of the iris. In the(~\) EriJ/latinr) into fhf ti^WW nf thp anteT\°\ layers of the iris many small cells (emi-\i.) £jXUOaiZOn %ruo Ult UbSUe OJ Hie grated leucocytes)—likewise an evidence of irU makes the latter, since it is filled inflaa^ation-lie between the pigment cells. with an abundance of round ce
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecteye, booksubjectophth
