Examlex
The needle size most commonly used by the blood bank for donations is _____ gauge.
Snellen Chart
A chart used to measure visual acuity, consisting of rows of letters that decrease in size, which an individual reads from a standard distance to determine the sharpness or clarity of their vision.
Landolt C Chart
A visual acuity test chart that uses a ring or "C" shaped figure oriented in various directions to measure eyesight.
Pelli-Robson Chart
A tool used in vision testing to assess contrast sensitivity using letters of varying contrast levels.
Audiometer
An electronic device that measures hearing acuity by producing sounds in specific frequencies and intensities.
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