Read e-book online 2007-2008 Basic and Clinical Science Course Section 12: PDF

By American Academy of Ophthalmology, Carl D. Regillo, MD

ISBN-10: 1560558008

ISBN-13: 9781560558002

Offers present info from medical trials on significant retinal stipulations, together with age-related macular degeneration and diabetic retinopathy. contains an summary of diagnostic concepts in retinal imaging, electrophysiologic checking out, and new genetic techniques to diagnosing and classifiying retinal dystrophies and degenerations.

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Extra resources for 2007-2008 Basic and Clinical Science Course Section 12: Retina and Vitreous

Example text

Campbell and Green were the first to use the interferometric method to measure the MTF of the eye psychophysically (Campbell & Green, 1965). In this classic technique, the human observer is asked to adjust the contrast of the fringes until they are just visible. Next, the observer repeats this judgment for sinusoidal gratings generated on the face of an oscilloscope or computer monitor. , the loss of contrast due to imperfect imaging). Replication of this experiment at different spatial frequencies thus pro- 24 Larry N.

23) In words, Equation 23 says that the amplitude U of the light distribution in a distant plane due to diffraction of a monochromatic plane wave by an aperture is proportional to the inverse Fourier transform of the aperture’s pupil function P. Equation 22 has had a major impact on optics, including visual optics, in the latter half of the 20th century because it brings to bear the powerful theory of linear systems and its chief computational tool, the Fourier transform (Bracewell, 1969; Gaskill, 1978; Goodman, 1968; Williams & Becklund, 1989).

In this case the field amplitude U is constant over the aperture, and thus the diffraction pattern and the aperture are related by the Fourier transform. A compact notation for this Fourier transform operation uses an arrow to indicate the direction of the forward Fourier transform F U(xˆ , yˆ ) → P(xˆ , yˆ ). (23) In words, Equation 23 says that the amplitude U of the light distribution in a distant plane due to diffraction of a monochromatic plane wave by an aperture is proportional to the inverse Fourier transform of the aperture’s pupil function P.

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2007-2008 Basic and Clinical Science Course Section 12: Retina and Vitreous by American Academy of Ophthalmology, Carl D. Regillo, MD


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