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The Phoroptor (1922)
The Phoroptor is a book written by Henry Lawrence DeZeng in 1922. This book is a comprehensive guide to the phoropter, an instrument used in optometry to measure a patient's refractive error and determine the appropriate prescription for corrective lenses. The book covers the...
The Phoroptor (1922)
The Phoroptor is a book written by Henry Lawrence DeZeng and originally published in 1922. It is a comprehensive guide to the use and operation of the phoroptor, an instrument used by optometrists and ophthalmologists to measure a patient's refractive error and determine the...
The Phoroptor (1922)
The Phoroptor is a book written by Henry Lawrence DeZeng and published in 1922. This book is a comprehensive guide to the phoroptor, a device used by optometrists and ophthalmologists to measure a patient's refractive error and determine the best prescription for correcting it...
The Phoroptor (1922)
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