The commoner diseases of the eye : how to detect and how to treat them . ant irritation of thecentral system is responsible for attacks ofchorea, epilepsy, migraine, neurasthenia, nerv-ous indigestion, biliousness, and other dis-orders of the sympathetic system—symptomsthat disappear when proper glasses are worn. Astigmatism and the Ophthalmometer. Corneal astigmatism is measured by an instru-ment called the ophthalmometer, whose efficacydepends upon the variation in the images of ob-jects in the apparatus (mires) cast upon theabnormally shaped cornea. The various posi-tions assumed by these i
The commoner diseases of the eye : how to detect and how to treat them . ant irritation of thecentral system is responsible for attacks ofchorea, epilepsy, migraine, neurasthenia, nerv-ous indigestion, biliousness, and other dis-orders of the sympathetic system—symptomsthat disappear when proper glasses are worn. Astigmatism and the Ophthalmometer. Corneal astigmatism is measured by an instru-ment called the ophthalmometer, whose efficacydepends upon the variation in the images of ob-jects in the apparatus (mires) cast upon theabnormally shaped cornea. The various posi-tions assumed by these images (as seen througha telescope) are registered and the amount ofastigmatism calculated. Use of the Ophthalmoscope.—Although it i-not within the province of this elementary workto teach the use of the ophthalmoscope, thephysician should be able to recognize the normalfundus through the dilated pupil. 1 le should AMETROPIA. FITTING OF GLASSES.—OPHTHALMOSCOPE O* also be in a position to detect those very evident,gross changes in the choroid, retina, optic nerve,. Test Objects (Mires) of the Ophthalmometer,and optic media that so often furnish the bestevidence of disease in other and distant organs. R8 COMMONER DISEASES OF THE EYE
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Keywords: ., bookcentury1900, bookdecade1900, bookidcommonerdise, bookyear1904
