Refraction And Visual Acuity
Refraction And Visual Acuity
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In our eReader you can find the full English version of the book. Read Refraction And Visual Acuity Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Refraction And Visual Acuity
What reading level is Refraction And Visual Acuity book?
To quickly assess the difficulty of the text, read a short excerpt:
In Table IL, for example, there are red letters on a brown ground, which cannot be deciphered by a red-blind person.
The objection to the test is that when the two colours happen to suit the colour-blind person's in- dividual peculiarity, the letters will be recognised.
Colour Lanterns Edridge-Green (London). — The description of this is contained in the present text (page 97. ) W. Thomson (Philadelphia). — He has designed a lantern for colour-perception which is used as sup- plementary to the ...New Wool-Test, and to the use of soiled service signal flags.
C. H. Williams (Boston, U. S. A). — This lantern presents a large disc of 1 8 inches diameter, w^hich bears thirteen smaller discs of coloured glass. This may be revolved so that any colour can be brought in front of the fixed light. A movable diaphragm in front of the glasses permits of variation in the size of the disc shown. These latter openings cor- i8o REFRACTION AND VISUAL ACUITY respond in size to the component parts of letters in Snellen's test-types ; e.
What to read after Refraction And Visual Acuity?
You can find similar books in the "Read Also" column, or choose other free books by Kenneth Mackenzie Scott to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In Table IL, for example, there are red letters on a brown ground, which cannot be deciphered by a red-blind person.
The objection to the test is that when the two colours happen to suit the colour-blind person's in- dividual peculiarity, the letters will be recognised.
Colour Lanterns Edridge-Green (London). — The description of this is contained in the present text (page 97. ) W. Thomson (Philadelphia). — He has designed a lantern for colour-perception which is used as sup- plementary to the ...New Wool-Test, and to the use of soiled service signal flags.
C. H. Williams (Boston, U. S. A). — This lantern presents a large disc of 1 8 inches diameter, w^hich bears thirteen smaller discs of coloured glass. This may be revolved so that any colour can be brought in front of the fixed light. A movable diaphragm in front of the glasses permits of variation in the size of the disc shown. These latter openings cor- i8o REFRACTION AND VISUAL ACUITY respond in size to the component parts of letters in Snellen's test-types ; e.
What to read after Refraction And Visual Acuity?
You can find similar books in the "Read Also" column, or choose other free books by Kenneth Mackenzie Scott to read onlineMoreLess
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