Ocular Axial Length and Choroidal Thickness in Newly Hatched Chicks and One-year-old Chickens Fluctuate in a Diurnal Pattern that is Influenced by Visual Experience and Intraocular Pressure Changes

Autor: PAPASTERGIOU, GEORGIOS I., SCHMID, GREGOR F., RIVA, CHARLES E., MENDEL, MARK J., STONE, RICHARD A., LATIES, ALAN M.
Zdroj: Experimental Eye Research; February 1998, Vol. 66 Issue: 2 p195-205, 11p
Abstrakt: Low coherence laser Doppler interferometry (LDI) allows high precision measurements of the axial length of the eye and of the thickness of the individual layers of the ocular fundus. Here, we used LDI to monitor diurnal changes in these dimensions in eyes of newly hatched chicks and one-year-old chickens with normal or altered visual input. In chicks and chickens with normal visual experience, axial eye length displays diurnal fluctuations increasing during the light phase. Choroidal thickness also exhibits a diurnal pattern, shrinking during the day and expanding during the night. Retinal thickness does not vary. Based on the pressure compliance of the enucleated chick eye, the diurnal intraocular pressure (IOP) fluctuation could contribute both to the increase in axial length and to daytime choroidal shrinkage.
Databáze: Supplemental Index
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