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DIFFRACTION AND VISUAL RESOLUTION
Author(s) -
HALLDÉN ULF
Publication year - 1973
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1973.tb08248.x
Subject(s) - pupil , diffraction , limiting , optics , resolution (logic) , visual acuity , aperture (computer memory) , ophthalmology , optometry , medicine , physics , computer science , artificial intelligence , engineering , acoustics , mechanical engineering
Diffraction is generally regarded as the limiting factor of visual resolution, at least when the diameter of the pupil is less than 2.5 mm. This does not agree well with the clinical experience that it is not unusual for patients treated with miotics, who have a pupil diameter of less than 1 mm, to have normal visual acuity. A quantitative discussion of the diffraction pattern of a circular aperture and of the Stiles‐Crawford effect gives no adequate explanation of this discrepancy.