PMID: 2486491Jun 1, 1989Paper

From visual acuity to hyperacuity: a 10-year update

Canadian Journal of Psychology
J GwiazdaR Held

Abstract

Visual acuity, the most basic measure of developing pattern vision in human infants, has been used extensively for detecting anomalies of vision and oculomotor coordination. In the past 10 years much has been learned about the development of two hyperacuities, namely, vernier acuity and stereoacuity. These two acuities become superior to grating acuity after the third month and remain so throughout life. Compared to females, males show slower development of stereopsis and vernier acuity, but not grating acuity, during the third through sixth months. We have suggested that this may result from the neurotrophic effects of the early pulse of testosterone found in males. Measures of vernier acuity have proven effective in detecting meridional amblyopia in older children who had significant astigmatism in the first year and subsequently lost it. The susceptible period for acquiring meridional amblyopia extends from the second half of the first year to at least the end of the second year. Deviations from the typical oblique effect (equal acuity for vertical and horizontal edges; equal, but lower, acuity for left oblique and right oblique) may result from uncorrected astigmatism early in life.

Citations

Sep 1, 1996·Behavioural Brain Research·M L CrawfordG K von Noorden
Sep 5, 2012·Biology of Sex Differences·Israel AbramovAlla Chavarga
Jan 1, 1995·The International Journal of Neuroscience·V ZemonH Shoup
Jan 31, 2008·Perceptual and Motor Skills·Sergio Cesare Masin
Oct 3, 2000·Optometry and Vision Science : Official Publication of the American Academy of Optometry·E KimR Srinivasan
Jan 21, 2021·International Journal of Environmental Research and Public Health·Eliala A SalvadoriEvin Aktar
May 1, 2013·Infancy : the Official Journal of the International Society on Infant Studies·Kasey C Soska, Scott P Johnson

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