Macular-Foveal Capillaries in Human Retina

Yeung, Joseph; Crock, G. W.; Cairns, James D.; Heinze, Julian; Troski, Samuel; Billson, Francis A.

doi:10.1111/j.1442-9071.1973.tb00103.x

Cited by 24 publications

(10 citation statements)

References 8 publications

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“…Cases with no or only an extremely small capillary-free zone in the macula have been reported [8,9] and these abnormalities are reported to be found frequently in prema ture infants [10,11]. On this basis, it has been hypothesized that during fetal development the vascular network is present in the mac ular area which then disappears forming the capillary-free zone either before or after birth [10].…”

mentioning

confidence: 99%

Retinal Vascular Patterns in the Macula and the Perimacular Area in Premature and Full-Term Infants

Nishimura¹,

Taniguchi²

1982

Ophthalmologica

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27 eyes of 20 premature and full-term infants were subjected to trypsin digestion, and a study was made of the extension of the temporal retinal vessels and of the formation of the radial peripapillary capillaries (RPCs) and the capillary-free zone in the macula. The advancing borders of the temporal retinal vessels exhibited a V-shaped appear-rance in cases of 23–29 weeks in gestational age. The RPCs were observed in cases after the 27th week of gestation. The capillary-free zone in the macula was observed in cases after the 25th week of gestation. There were two eyes having extremely small and incomplete capillary-free zones: in one eye a vascular network was present in the region corresponding to the center of the macula. It was thought that the vascular network in the temporal horizontal aspect of the macula is formed by anastomosis of the superior and inferior temporal vessels, and that the capillary-free zone in the macula develops secondarily as the result of retraction of the capillaries.

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confidence: 99%

Retinal Vascular Patterns in the Macula and the Perimacular Area in Premature and Full-Term Infants

Nishimura¹,

Taniguchi²

1982

Ophthalmologica

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“…Bird and Weale [10] initially demonstrated that blood vessels were common in the center of the fo vea. Yeung and colleagues [15] presented 17 healthy subjects with FAZ replaced by a poly gonal net of normal-looking capillaries or transected by capillaries. In the present study, 5 (18.5%) out of 27 control subjects had the FAZ covered or transected by a capillary net work.…”

Section: Discussionmentioning

confidence: 99%

Foveal Avascular Zone in Idiopathic Juxtafoveolar Telangiectasia

Mansour

Schachat

1993

Ophthalmologica

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We measured angiographically the foveal avascular zone (FAZ) in 26 subjects with idiopathic juxtafoveolar telangiectasia (IJFT) and 27 control subjects. Quantitatively, FAZ was significantly smaller in IJFT (median = 0 mm²) than in controls (median = 0.405 mm²). Qualitatively, the telangiectasia in IJFT was temporal (92.5% of eyes) and appeared as microaneurysms interconnected with several capillaries, spider-shaped microaneurysms, or Coats’ like telangiectasia. IJFT is characterized by temporal telangiectasia and small FAZ.

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Section: Commentmentioning

confidence: 98%

“…Lowenstein (1942) and Yeoung (1973) demonstrated a capillary-free area which measured 0 165 to 0 07 mm respectively. The variability in size does not appear to prejudice foveal function (Yeoung, 1973). Bird and Weale (1974) showed that capillaries can cross the central foveal area in patients with normal visual acuity, and similar findings were obtained by Shikano and Shimizu (1968).…”

Section: Commentmentioning

confidence: 98%

“…The central area has been described as avascular (Duke-Elder, 1961), although capillaries of small calibre but of considerable length may be demonstrated there by fluorescein angiography (Lowenstein, 1942;Yeoung et al, 1973;Bird and Weale, 1974). The difference between the macular and non-macular retinal circulation may be 'physiologically significant' (Henkind, 1975).…”

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confidence: 99%

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