episcleral

External signs include dilated episcleral blood vessels (sentinel vessels).

Measurement of episcleral venous pressure.

Episcleral radionuclide plaque brachytherapy and external-beam, charged-particle radiation therapy offer patients eye-sparing and vision-sparing alternatives to enucleation.

The redness in the eye associated with episcleritis is due to engorgement of the large episcleral blood vessels, which run in a radial direction from the limbus.

Merchant TE, Gould CJ, Wilson MW, et al.: Episcleral plaque brachytherapy for retinoblastoma.

Tabandeh H, Chaudhry NA, Murray TG, et al.: Intraoperative echographic localization of iodine-125 episcleral plaque for brachytherapy of choroidal melanoma.

Harbour JW, Murray TG, Byrne SF, et al.: Intraoperative echographic localization of iodine 125 episcleral radioactive plaques for posterior uveal melanoma.

A vascular plexus is found between the conjunctiva and the sclera consisting of two layers of vessels, the superficial episcleral vessels and the deep episcleral vessels.

From there, the aqueous humour exits the eye through the trabecular meshwork into Schlemm's canal (a channel at the limbus, i.e., the joining point of the cornea and sclera, which encircles the cornea) It flows through 25-30 collector canals into the episcleral veins.

From here, it drains into Schlemm's canal by one of two ways: directly, via aqueous vein to the episcleral vein, or indirectly, through collector channels to the episcleral vein by intrascleral plexus and eventually into the veins of the orbit.