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The contrast sensitivity of the newborn human infant.

TitleThe contrast sensitivity of the newborn human infant.
Publication TypeJournal Article
Year of Publication2015
AuthorsBrown AM, Lindsey DT, Cammenga JG, Giannone PJ, Stenger MR
JournalInvest Ophthalmol Vis Sci
Date Published2015 Jan
KeywordsContrast Sensitivity, Female, Fixation, Ocular, Humans, Infant, Newborn, Male, Sensory Thresholds, Vision Tests, Vision, Binocular

PURPOSE: To measure the binocular contrast sensitivity (CS) of newborn infants using a fixation-and-following card procedure.

METHODS: The CS of 119 healthy newborn infants was measured using stimuli printed on cards under the descending method of limits (93 infants) and randomized/masked designs (26 infants). One experienced and one novice adult observer tested the infants using vertical square-wave gratings (0.06 and 0.10 cyc/deg; 20/10,000 and 20/6000 nominal Snellen equivalent); the experienced observer also tested using horizontal gratings (0.10 cyc/deg) and using the Method of Constant Stimuli while being kept unaware of the stimulus values.

RESULTS: The CS of the newborn infant was 2.0 (contrast threshold = 0.497; 95% confidence interval: 0.475-0.524) for vertically oriented gratings and 1.74 (threshold = 0.575; 95% confidence interval: 0.523-0.633) for horizontally oriented gratings (P

CONCLUSIONS: The CS of individual newborn human infants can be measured using a fixation-and-following card procedure.

Alternate JournalInvest. Ophthalmol. Vis. Sci.
PubMed ID25564453
PubMed Central IDPMC4309312
Grant ListR41EY022545 / EY / NEI NIH HHS / United States
UL1 TR001070 / TR / NCATS NIH HHS / United States
UL1TR001070 / TR / NCATS NIH HHS / United States

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