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This method demonstrates potential for effective vision testing using display monitors and relay lenses, indicating significant improvements in testing accuracy.
Resolution limitations preclude the use of display monitors for near testing of acuity and contrast sensitivity. Relay lenses can form minified aerial images of the display at any given near viewing distance, but the image will differ in spatial frequency from the display. Equations are presented that can be used to specify the far‐ and near‐viewing distances and the necessary focal length of a lens so that the display and its near aerial image have identical spatial frequencies when viewed by a subject at a fixed location. Modulation transfer function (MTF) calculations show that achromatic doublets will not degrade the resolution across a 300‐mm wide display, thereby providing the versatility of display monitors for near vision testing.
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Milton Katz (2000) studied this question.
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