The contrast sensitivity of the newborn human infant.
|Title||The contrast sensitivity of the newborn human infant.|
|Publication Type||Journal Article|
|Year of Publication||2015|
|Authors||Brown AM, Lindsey DT, Cammenga JG, Giannone PJ, Stenger MR|
|Journal||Invest Ophthalmol Vis Sci|
|Date Published||2015 Jan|
|Keywords||Contrast 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 Journal||Invest. Ophthalmol. Vis. Sci.|
|PubMed Central ID||PMC4309312|
|Grant List||R41EY022545 / EY / NEI NIH HHS / United States |
UL1 TR001070 / TR / NCATS NIH HHS / United States
UL1TR001070 / TR / NCATS NIH HHS / United States