Retinoscopy (or shadow test) in the determination of refraction at one meter distance, with the plane mirror / by James Thorington.

  • Thorington, James, 1858-1944.
Date:
1912
Catalogue details

Licence: In copyright

Credit: Retinoscopy (or shadow test) in the determination of refraction at one meter distance, with the plane mirror / by James Thorington. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    on the metal disc are for the patient to look at while the eye is being examined and the lenses changed before his Pig. 2.—The Author's Retinoscope.* eye. The plating or silvering on the mirror should be of the best, and free from any flaws or imperfections, for on I Fig 3.—Author's Latest Model Retinoscope. In Three Pakts. (i) Metal Disc and Handle, Straight or Folding; (2) Metal Back for the Mirror; (3) Plane Mirror with Sight Hole made by removing the Silver- ing. (See text.) its quality depends, in part, the good reflecting power of the mirror, which is very important. The central shadow just referred to as the result of the sight-hole had best be seen by the beginner by reflecting ' See foot-note on preceding page.