Projection Protractor for Use with a Bjerrum Screen
نویسندگان
چکیده
منابع مشابه
Stereo-campimetry; a method for use with the Bjerrum screen.
FEW will deny the tedium of routine campimetry in any circumstances, and when the need for accuracy arises in a patient whose responses are vague and hesitating, the procedure is apt to be converted into one of competitive guesswork between the subject and the observer, the results of which are of somewhat uncertain clinical value. Unfortunately, it is in such cases that reliable information ab...
متن کاملA Projection System with Radiometric Compensation for Screen Imperfections
A major limitation of existing projection display systems is that they rely on a high quality screen for projecting images. We believe that relaxing this restriction will make projectors more useful and widely applicable. The fundamental problem with using an arbitrary surface for a screen is that the surface is bound to have its own colors and textures (bricks of a wall, painting on a wall, ti...
متن کاملMeasurement of eccentric fixation by the Bjerrum screen.
Introduction by G. W. Black andJ. Foster.-The forward movement of orthoptic technique between 1925 and 1935 depended on a re-appreciation of the importance of anomalous retinal correspondence, measured by the improved synoptophores then available. Before this, many patients had been wasting their time on unsupervised divergence exercises. In this decade Ciippers's discovery of the high percenta...
متن کاملDo rotation coordinates provide the substrate for a mental protractor?
In previous studies, we have found that the accuracy in judging collinearity of lines or dots varies considerably from one subject to another as a function of the relative angle of the stimulus elements. A model of errors generally shows large excursions across several subranges of angular position. These do not appear to be motor errors, at least not ones that are well separated from perceptua...
متن کاملPerformance comparison of land change modeling techniques for land use projection of arid watersheds
The change of land use/land cover has been known as an imperative force in environmental alteration, especially in arid and semi-arid areas. This research was mainly aimed to assess the validity of two major types of land change modeling techniques via a three dimensional approach in Birjand urban watershed located in an arid climatic region of Iran. Thus, a Markovian approach based on two suit...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the Royal Society of Medicine
سال: 1933
ISSN: 0035-9157
DOI: 10.1177/003591573302600839