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The foveola is the central floor of the fovea, approximately 0.35mm in diameter, and is the area of retina with the greatest visual acuity. It can be differentiated from the fovea histologically by an absence of ganglion cells and rods. The cones in this area are narrower than in other parts of the retina, allowing for more cones per unit area.
Cones are the predominant photoreceptor in the fovea and are connected to ganglion cells in a 1:1 ratio; Ganglion cells are concentrated outside of the central fovea, allowing more light to reach the central photoreceptors; Foveal photoreceptor axons form Henle’s layer run in an oblique fashion due to the peripheral concentration of ganglion ...
Purpose. To evaluate foveal function in patients with inherited retinal degenerations (IRD) by measuring visual acuity (VA) after correction of higher-order aberrations. Methods. Adaptive optics scanning laser ophthalmoscopy (AOSLO) was used to image cones in 4 healthy subjects and 15 patients with IRD.
- Katharina G. Foote, Katharina G. Foote, Panagiota Loumou, Shane Griffin, Jia Qin, Kavitha Ratnam, Tr...
- 10.1167/iovs.17-23708
- 2018
- 2018/07
We summarize the development, structure, different neural types and neural circuitry in the human fovea. The foveal pit is devoid of rod photoreceptors and of secondary and tertiary neurons, allowing light to directly stimulate cones and give us maximal visual acuity.
- Helga Kolb, Ralph F. Nelson, Peter K. Ahnelt, Isabel Ortuño-Lizarán, Nicolas Cuenca
- 1995
17 de jun. de 2020 · Discussion. We used high-throughput single-cell RNA-seq to generate a cell atlas of the adult human retina. From 55,736 foveal and 29,246 peripheral retinal cells, we identified 58 cell types. We ...
- Wenjun Yan, Yi-Rong Peng, Yi-Rong Peng, Tavé van Zyl, Aviv Regev, Karthik Shekhar, Karthik Shekhar, ...
- 2020
19 de out. de 2021 · The fovea represents a depression in the middle of the macula and is the site of the highest cone concentration, which is designated as the central bouquet of cones 10.
green-sensitive cones and cones density decrease away from the fovea explaining the decrease in the visual acuity away from xation. In the fovea the inner cellular layers of the retina are displaced laterally so as light scatter is reduced. Beneath the fovea, RPE density is very high as this is a very active metabolic region.
