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Prominent limbal ring Light brown iris with a distinct limbal ring. A limbal ring is a dark ring around the iris of the eye, where the sclera meets the cornea. [1] It is a dark-colored manifestation of the corneal limbus resulting from optical properties of the region. [2]
It can be complete, sectoral, or central. In complete heterochromia, one iris is a different color from the other. In sectoral heterochromia, part of one iris is a different color from its remainder. In central heterochromia, there is a ring around the pupil or possibly spikes of different colors radiating from the pupil.
The corneal limbus manifests as a dark ring around the iris. Its prominence varies by individual. The corneal limbus is the border between the cornea and the sclera. [1] It is highly vascularised. [1] Its stratified squamous epithelium is continuous with the epithelium covering the cornea. [2]
The iris consists of two layers: the front pigmented fibrovascular layer known as a stroma and, behind the stroma, pigmented epithelial cells.. The stroma is connected to a sphincter muscle (sphincter pupillae), which contracts the pupil in a circular motion, and a set of dilator muscles (dilator pupillae), which pull the iris radially to enlarge the pupil, pulling it in folds.
Learn all about Zendaya's east-west engagement ring symbolism—plus, why we think this style is making a major comeback in 2025. Learn all about Zendaya's east-west engagement ring symbolism ...
"As a symbol, a hawk is a reminder to see the world from thirty yards above; to see the big picture," Dubois explains. Encountering a hawk invites us to similarly elevate our perspective.
VRAI shares tips to help navigate the meanings behind various popular lab-grown diamond ring shapes to find the perfect symbol for every unique love story. What Do the Shapes of Engagement Rings Mean?
Arcus senilis (AS), also known as gerontoxon, arcus lipoides, arcus corneae, corneal arcus, arcus adiposus, or arcus cornealis, are rings in the peripheral cornea.It is usually caused by cholesterol deposits, so it may be a sign of high cholesterol.