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Dark-adapted thresholds at 10– and 30–deg eccentricities in 10–week-old infants

Published online by Cambridge University Press:  02 June 2009

Ronald M. Hansen  and
Anne B. Fulton
Ronald M. Hansen
Affiliation:
Department of Ophthalmology, Children's Hospital and Harvard Medical School, Boston
Anne B. Fulton
Affiliation:
Department of Ophthalmology, Children's Hospital and Harvard Medical School, Boston
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Abstract

We tested the hypothesis that the dark-adapted sensitivity of the near central retina is lower than that of peripheral retina in 10–week-old infants. A spatial two alternative forced-choice psychophysical method was used to estimate the threshold for 2–deg spots presented 10 deg and 30 deg from the center of a screen. Each 10–week-old infant (n = 11) and adult (n = 5) subject was tested at both eccentricities. Every infant's threshold at 10 deg is higher than that at 30 deg. The median difference between the infants' thresholds at 10 deg and 30 deg is about 0.5 log unit. Whereas the scotopic thresholds of adults at 10 deg and 30 deg are virtually identical, the thresholds of infants' near central retina are higher than those in more peripheral retina. Delayed maturation of the near central rod outer segments with consequent lower quantum catch may be the primary determinant of this infantile sensitivity pattern.

Keywords

RodsScotopic sensitivityHuman infantsDevelopment
Type
Research Articles
Information
Visual Neuroscience , Volume 12 , Issue 3 , May 1995 , pp. 509 - 512
Copyright
Copyright © Cambridge University Press 1995

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References

Fulton, A.B. & Hansen, R.M. (1994). Development of scotopic retinal function. In Principles and Practice of Ophthalmology, Basic Sciences, ed. Albert, D.M. & Jakobiec, F.A., Ch. 47, pp. 648–653. Philadelphia, PA: W.B. Saunders Co.Google Scholar
Fulton, A.B., Dodge, J., Hansen, R.M., Schremser, J.-L. & Williams, T.P. (1991). The quantity of rhodopsin in young human eyes. Current Eye Research 10, 977–982.Google Scholar
Fulton, A.B., Hansen, R.M., Dorn, E. & Hendrickson, A.E. (1994). Development of the structure and function of primate rods. Proceedings of 4th Meeting of the Child Vision Research Society. New York: Oxford University Press (in press).Google Scholar
Hansen, R.M. & Fulton, A.B. (1993). Development of scotopic retinal sensitivity. In Early Visual Development, Normal and Abnormal, ed. Simons, K., Ch. 8, pp. 130–142. New York: Oxford University Press.Google Scholar
Hansen, R.M. & Fulton, A.B. (1994). The VEP thresholds for full field stimuli in dark adapted infants. Visual Neuroscience 12, 223–228.Google Scholar
Hansen, R.M., Fulton, A.B. & Harris, S.J. (1986). Background adaptation in human infants. Vision Research 26, 771–779.CrossRefGoogle Scholar
Hendrickson, A.E. (1994). Primate foveal development: A microcosm of current issues in neurobiology. Investigative Ophthalmology and Visual Science (Suppl.) 35, 1480.Google Scholar
Hendrickson, A.E. & Drucker, D. (1992). The development of parafoveal and mid-peripheral human retina. Behavioral Brain Research 49, 21–31.Google Scholar
Larsen, J.S. (1971). The sagittal growth of the eye. IV. Ultrasonic measurements of the axial length of the eye from birth to puberty. Acta Ophthalmologica 49, 873–886.CrossRefGoogle Scholar
Massof, R.W. & Finkelstein, D. (1979). Rod sensitivity relative to cone sensitivity in retinitis pigmentosa. Investigative Ophthalmology and Visual Science 18, 263–272.Google Scholar
Pulos, E. (1989). Changes in rod sensitivity through adulthood. Investigative Ophthalmology and Visual Science 30, 1738–1742.Google Scholar
Schneck, M.E., Hamer, R.D., Packer, O.S. & Teller, D.Y. (1984). Area threshold relations at controlled retinal locations in 1–month-old human infants. Vision Research 24, 1753–1763.Google Scholar
Teller, D.Y. (1979). The forced choice preferential looking method: A psychophysical technique for use with human infants. Infant Behavioral Development 2, 135–153.Google Scholar
Wetherill, G.B. & Levitt, H. (1965). Sequential estimation of points on a psychometric function. British Journal of Mathematical Statistics and Psychology 18, 1–10.Google Scholar
Wyszecki, G. & Stiles, W.S. (1982). Color Science: Concepts and Methods, Quantitative Data and Formulae, pp. 102–103. New York: Wiley.Google Scholar