The Refraction of the Eye; Including a Complete Treatise On Ophthalmometry; a Clinical Text-Book for Students And Practitioners
The Refraction of the Eye; Including a Complete Treatise On Ophthalmometry; a Clinical Text-Book for Students And Practitioners
Davis, Achilles Edward, 1866-
The book The Refraction of the Eye; Including a Complete Treatise On Ophthalmometry; a Clinical Text-Book for Students And Practitioners was written by author Davis, Achilles Edward, 1866- Here you can read free online of The Refraction of the Eye; Including a Complete Treatise On Ophthalmometry; a Clinical Text-Book for Students And Practitioners book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Refraction of the Eye; Including a Complete Treatise On Ophthalmometry; a Clinical Text-Book for Students And Practitioners a good or bad book?
What reading level is The Refraction of the Eye; Including a Complete Treatise On Ophthalmometry; a Clinical Text-Book for Students And Practitioners book?
To quickly assess the difficulty of the text, read a short excerpt:
Binocular single vision is absent. There is no lesion in the fundus of either eye. This is the only case of the kind that has come under my observa- tion. Digitized by VjOOQIC %ifj^ Fig. 101. — Strabometer of Laurence. distant point, and noting the number of millimeters distance the center of the cornea is from the center of the instrument, we at once ascertain the amount of the deviation in millimeters. As each millimeter of deviation represents roughly an angle of 5°, we can reduce the linear... deviation to an equivalent expressed in degrees, by simply multiplying the num- ber of millimeters of deviation by five ; for example, say the linear deviation was three millimeters, this reduced to degrees would be 15°, and so on.^ (2) The extent of deviation or squint- ing of an eye may be measured with the perimeter. Place the patient in front of the instrument, with the deviating eye in line with the center of the arc, just as if to take the field of vision. Leave both €yes open, and have the good one directed to a distant object (20 feet) directly i
User Reviews: