foveola


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Related to foveola: macula

foveola

 [fo-ve´o-lah] (pl. fove´olae) (L.)
a minute pit or depression.

fo·ve·o·la

, pl.

fo·ve·o·lae

(fō-vē'ō-lă, -lē), [TA] Avoid the mispronunciation foveo'la. Do not confuse this word with faveolus.
A minute fovea or pit.
[Mod. L. dim. of L. fovea, pit]

foveola

(fō-vē′ə-lə)
n. pl. foveo·lae (-lē′) or foveo·las
A small fovea.

fo·ve·o·la

, pl. foveolae (fō-vē'ō-lă, -ē) [TA]
A minute fovea or pit.
[Mod. L. dim. of L. fovea, pit]

foveola

The base of the fovea centralis with a diameter of about 0.35 mm (or about 1º of the visual field). The image of the point of fixation is formed on the foveola in the normal eye. The foveola contains cone cells only (rod-free area). The foveal avascular zone is slightly larger (about 0.5 mm in diameter) (Fig. F9). Syn. fovea (term often used by clinicians). See eccentricity; fixation; umbo.
Fig. F9 Cross-section of the retina showing the fovea centralis and foveola (rod-free area)enlarge picture
Fig. F9  Cross-section of the retina showing the fovea centralis and foveola (rod-free area)
References in periodicals archive ?
Olgumuzda aberran venin foveola merkezinde bulunuyor olmasi gorme keskinligini dusurucu bir faktor olabilir.
Longitud (pronoto-elitros) 4.0-5.6 mm, ancho 2.3-3.3 mm; integumento del cuerpo y apendices rojo obscuro; ocasionalmente obscuros a casi negros; elitros con pequenas manchas de pubescencia negra; cabeza subtriangular, cubierta con puntuaciones densas; frente sin una carina linear media o con una linea punteada; eje transversal del sulcus metepisternal formando un angulo recto; superficie dorsal del pronoto con foveolas concentradas solamente en las areas laterales, surco cervical fino con dos setas cervicales; armadura del saco interno de la genitalia del macho como en las Figs.