Fundus (eye)
Concave interior of the eye
- 1 min read
- 2 chapters
Related on Lably
Through Signs and symptoms, Bleeding and Blood vessel
Variation
The color of the fundus varies both between and within species. In one study of primates the retina is blue, green, yellow, orange, and red; only the human fundus (from a lightly pigmented blond person) is red. The major differences among the "higher" primate species were size and regularity of the border of macular area, size and shape of the optic disc, apparent 'texturing' of retina, and pigmentation of retina.
Sign in to keep reading
One more chapter is free with a Lably account.
Clinical significance
Medical signs that can be detected from observation of eye fundus (generally by funduscopy) include hemorrhages, exudates, cotton wool spots, blood vessel abnormalities (tortuosity, pulsation and new vessels) and pigmentation. Arteriolar constriction, seen as "silver wiring", and vascular tortuosities are seen in hypertensive retinopathy.
The eye's fundus is the only part of the human body where the microcirculation can be observed directly. The diameter of the blood vessels around the optic disc is about 150 μm, and an ophthalmoscope allows observation of blood vessels with diameters as small as 10 μm.