HAND HELD TONOMETER INCLUDING OPTICAL PROXIMITY INDICATOR
A puff tonometer includes two light sources located at diametrically opposite points, preferably equidistant from the optical axis of the objective lens assembly of the tonometer. The sources are arranged to direct light forwardly of the tonometer such that, in use, and when positioned close to a pa...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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