Purchase this article with an account.
T.R. Candy, J. Wang, G.M. Tondel; Consensual Accommodation in Human Infants . Invest. Ophthalmol. Vis. Sci. 2003;44(13):4788.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Purpose: Retinal image quality depends upon accommodative performance. Theories of the effects of retinal image defocus on visual development must therefore consider the link in accommodation between the eyes. Are human infants' accommodative responses fully consensual during early postnatal development? Methods: Infants from 7-38 wks were recruited. A longpass filter (cutoff 850nm) was placed over one eye so that no visible wavelengths were transmitted to this occluded eye. An eccentric photorefractor (PowerRefractor) was used to record accommodative responses from both eyes, at a sampling rate of 25Hz, while a toy was repeatedly moved between 1m and 25cms infront of the unoccluded eye. Results: The accommodative responses of the occluded and unoccluded eyes were found to be tightly matched in both amplitude and temporal latency at all ages tested. Conclusions: Human infants' accommodative responses were found to be consensual from the youngest age tested. This confirms that care must be taken to consider the effects of consensual accommodation on retinal defocus in models of activity-dependent developmental processes.
This PDF is available to Subscribers Only