April 1978
Volume 17, Issue 4
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Articles  |   April 1978
Acuity and contrast sensitivity in 1-, 2-, and 3-month-old human infants.
Investigative Ophthalmology & Visual Science April 1978, Vol.17, 361-365. doi:
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      M S Banks, P Salapatek; Acuity and contrast sensitivity in 1-, 2-, and 3-month-old human infants.. Invest. Ophthalmol. Vis. Sci. 1978;17(4):361-365.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

The importance of assessing infant visual function is indicated by recent demonstrations that early visual experience in part determines the eventual state of adult visual function. It is argued that the contrast sensitivity function (CSF) could be a valuable index in the assessment of infant vision because it provides information concerning several aspects of vision. CSF's were measured in 1-, 2-, and 3-month-old infants. The "cut-off" spatial frequencies, which are estimates of visual acuity, were 2.4 cy/deg for 1-month-olds, 2.8 cy/deg for 2-month-olds, and 4.0 cy/deg for 3-month-olds. Sensitivity to contrast was shown to increase between 1 and 3 months of age. The CSF's measured also provide evidence for the presence of a low-frequency fall-off at 2 and 3 months.

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