Ocular Refraction And the Shadow Test
Ocular Refraction And the Shadow Test
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In our eReader you can find the full English version of the book. Read Ocular Refraction And the Shadow Test 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 Ocular Refraction And the Shadow Test
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To quickly assess the difficulty of the text, read a short excerpt:
Without any movement of the head now look at the threads of the curtain; when they appear distinctly, the object across the street will have becotne so blurred as to be indistinguishable.
Why is it that the distant object disappeared when looking at the curtain, and the mesh of the curtain disapipeared when looking at a distance ? The rays of light from both objects enter the eyes all the time.
Let figure 97 represent the emmetropic eye adjusted for distance, the parallel rays focus upon the re...tina. The divergent rays from the point P, represented by the dotted lines, do not focus upon the retina An emmetropic eye adapted for distance, the divergent rays represented by dotted lines, form circles of diffusion upon the retina their focus being behind the retina.
but at the point P' back of it. The rays from the object at P form circles of diffusion upon the retina and the object does not appear distinctly.
Figure An emmetropic eye adapted for a near point. The parallel rays, represented by dotted lines form circles of diffusion upon the retina, their focus being in front of the retina.
What to read after Ocular Refraction And the Shadow Test?
You can find similar books in the "Read Also" column, or choose other free books by Frederick Albert Bates to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Without any movement of the head now look at the threads of the curtain; when they appear distinctly, the object across the street will have becotne so blurred as to be indistinguishable.
Why is it that the distant object disappeared when looking at the curtain, and the mesh of the curtain disapipeared when looking at a distance ? The rays of light from both objects enter the eyes all the time.
Let figure 97 represent the emmetropic eye adjusted for distance, the parallel rays focus upon the re...tina. The divergent rays from the point P, represented by the dotted lines, do not focus upon the retina An emmetropic eye adapted for distance, the divergent rays represented by dotted lines, form circles of diffusion upon the retina their focus being behind the retina.
but at the point P' back of it. The rays from the object at P form circles of diffusion upon the retina and the object does not appear distinctly.
Figure An emmetropic eye adapted for a near point. The parallel rays, represented by dotted lines form circles of diffusion upon the retina, their focus being in front of the retina.
What to read after Ocular Refraction And the Shadow Test?
You can find similar books in the "Read Also" column, or choose other free books by Frederick Albert Bates to read onlineMoreLess
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