two difference luminance levels – found that infants and adults differed in their color preference. newborns and one month did not show any preference among the colored stimuli. it was found that three-month-old infants preferred the longer wavelength (red and yellow) to the short-wavelength (blue and green) stimuli, while adults had the opposite. however, both adults and infants preferred colored stimuli over non-colored stimuli. this study suggested that infants had a general preference for colored stimuli over non-colored stimuli at birth, though infants were not able to distinguish the different colored stimuli prior to the age of three months. research into the development of color vision using infant female japanese monkeys indicates that color experience is critical for normal vision development. infant monkeys were placed in a room with monochromatic lighting limiting their access to a normal spectrum of colors for a one-month period. after a one-year period, the monkey's ability to distinguish colors was poorer than that of normal monkey exposed to a full spectrum of colors. although this result directly pertains to infant monkeys and not humans, they strongly suggest that visual experience with color is critical for proper, healthy vision development in humans as well. light sensitivity the threshold for light sensitivity is much higher in infants compared to adults. from birth, the pupils of an infant remain constricted to limit the amount of entering light. in regards to pupil dimensions, newborn's pupil grow from approximately 2.2 mm to an adult length of 3.3 mm. a one-month-old infant can detect light thresholds only when it is approximately 50 times greater than that of an adult. by two months, the threshold decreases measurably to about ten times greater than that of an adult. the increase in sensitivity is the result of lengthening of the photoreceptors and further development of the retina. therefore, postnatal maturation of the retinal structures has led to strong light adaptations for infants. vision abnormalities in infants vision problems in infants are both common and easily treatable if addressed early by an ophthalmologist. critical warning signs excessive tearing red or encrusted eyelids white pupils extreme sensitivity to bright light constant eye turning vision problems strabismus nystagmus amblyopia photophobia tumor in the eye cataract