Synopsis
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1908 Excerpt: ...Immediately after, a deviation of one visual axis followed; then gradually, as the nebula absorbed, the deviation also lessened, and when the cornea was practically clear, the deviation had disappeared. § 2. Frequency.--We have as yet no very reliable data on this point. It is certain, however, that pure types of these cases are much less frequent than those referred to in the second or third divisions. § 3. Symptoms. (A) The deviation develops at any age, following as it does the formation of the opacity. (B) It may be in any direction--usually in or out. C) The degree of the deviation varies. (D) It may or may not be affected by efforts of accommodation nor by cycloplegics. (E) Concomitance is usually absent. (F) The arc of rotation, the lifting power, the rapidity of motion, and the periods of rest depend on whether an active or passive type has developed--if so, in what direction and to what extent. 15 225 § 4. Pathology.--Among these imperfections of the media, our attention should be directed especially to opacities of: (A) The cornea. The one which most frequently produces a deviation is a small spot near the center. (B) The lens. A deviation frequently follows a small capsular opacity near its center. It is quite often seen with pyramidal cataract and occasionally with lamellar cataract, but seldom following the ordinary nuclear senile cataract. (C) Opacities in the aqueous humor, strictly speaking, are never sufficient to produce a deviation, but may do so when an iritis has left deposits in the pupil. Those in the vitreous are seldom of such a size or in such a position as to obscure any one part of the retina, and therefore their influence is even less than those which occur in the aqueous humor. § 5. Treatment.--Each lesion m...
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