The Elidice: new instrument for visual acuity self-screening.
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چکیده
منابع مشابه
The Elidice: new instrument for visual acuity self-screening.
A compact electronic device which enables the user to determine for himself whether his visual acuity reaches a chosen standard has been constructed at a cost of 25 pounds. The instrument provides a test which requires the observer to respond to the orientation of a sequence of red Landolt-Cs and which takes under five minutes to complete. 'Crowding' effects associated with conventional letter ...
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ژورنال
عنوان ژورنال: British Journal of Ophthalmology
سال: 1977
ISSN: 0007-1161
DOI: 10.1136/bjo.61.7.489