The hyaloid canal (Cloquet canal) is a narrow channel running through the vitreous from the back of the lens to the optic disc. It is the remnant of the path of the hyaloid artery, which supplies the lens before birth.
| Location | Through the centre of the vitreous body, from the optic disc to the posterior lens |
|---|---|
| Parts |
|
| Nerve Supply | None |
| Blood Supply | Hyaloid artery (in the fetus only; normally regresses before birth) |
Carried the hyaloid artery during development; no important function after birth.
Incomplete regression of the hyaloid system can leave a small dot on the back of the lens or a stalk at the optic disc (Bergmeister papilla), usually harmless. More severe persistence (persistent fetal vasculature) can cause cataract and a small eye.
Failure of the hyaloid system to regress, causing white pupil, cataract or retinal problems in infants.
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