Abstract：
:In this study we describe a measurement method which closely approximates in vivo retinal thickness. Using this method we examined the laminar organisation of vascular and avascular retinae from placental and marsupial mammals. Thickness measurements on retinal wholemounts show that the avascular retinae of the placental guinea pig (140 microns) and the marsupial brushtail possum (170 microns) are thinner and show less centroperipheral taper than do the vascular retinae of placental cats (250 microns), rats (220 microns) and marsupial quolls (220 microns). In general, limitation in thickness of avascular retinae is borne by most retinal layers, but most particularly by the inner plexiform layer, the synaptic region farthest removed from the choroidal blood supply. Except for the absence of blood vessels, the histological organisation of the brushtail possum's retina resembles closely that of its fellow marsupial, the quoll's. In contrast, intraretinal organisation differs amongst the two avascular retinal species with the guinea pig displaying a much coarser photoreceptor grain.
journal_name
Vision Resjournal_title
Vision researchauthors
Buttery RG,Hinrichsen CF,Weller WL,Haight JRdoi
10.1016/0042-6989(91)90110-qsubject
Has Abstractpub_date
1991-01-01 00:00:00pages
169-87issue
2eissn
0042-6989issn
1878-5646pii
0042-6989(91)90110-Qjournal_volume
31pub_type
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