منابع مشابه
The spatial resolution capacity of human foveal retina.
An image on the retina of a human eye enters the visual system through an array of photoreceptors that sets the boundaries on the spatial detail available for neural representation. In order to investigate the extent to which the input spatial detail is preserved by the human neural system, we compare the anatomical spatial limits as determined by the Nyquist frequency, the highest spatial freq...
متن کاملThe foveal avascular region of developing human retina.
OBJECTIVE To study the development of the perifoveal retinal vasculature. METHODS We studied 7 retinas aged between 26 weeks' gestation and 1 week postnatal (41 weeks' gestation). Sections were imaged using high-resolution digital photography and blood vessel profiles identified at 200% to 300% magnification. Flat mounts were immunolabeled using antibodies to CD31 and factor VIII to identify ...
متن کاملFoveal Morphology and the Macular Carotenoids.
Primate foveas have several features that are relatively unique. One is the paucity of anterior vasculature in an area in which photoreceptor density, and hence metabolic activity, is strongly peaking (declining in number exponentially as one moves from the foveola). This area is called the foveal avascular zone (FAZ). Another is the dramatic accumulation of dietary carotenoids, specifically lu...
متن کاملFlat foveal contour simulating macular hole.
Kumar V, Gupta PN. BMJ Case Rep 2017. doi:10.1136/bcr-2017-222868 Description A 40-year-old healthy female was referred for macular hole in his both eyes detected during routine examination. Visual acuity was 20/20 OU unaided. Ocular examination of OD was unremarkable except for the presence of round red lesion at fovea (figure 1A, arrow) that was more prominent on green reflectance imaging (fi...
متن کاملRetina diabetic Macular oedema
© Touch MEdical MEdia 2013 45 Abstract diabetic macular oedema (dMo) is a leading cause of vision loss in the working-age population worldwide. Numerous early studies suggest an important role for intravitreal anti-VEGF agents such as bevacizumab in the management of dMo. We reviewed manuscripts that had investigated pharmacokinetic, efficacy, safety, dose and frequency of intravitreal bevacizu...
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ژورنال
عنوان ژورنال: Australian and New Zealand Journal of Ophthalmology
سال: 1973
ISSN: 0814-9763,1440-1606
DOI: 10.1111/j.1442-9071.1973.tb00103.x