Choroid

Looks like

A dark, blood-rich layer between the retina and the white of the eye.

What it does

Feeds the outer retina — the busiest blood supply in the body for its weight.

Keeping it well

Nothing routine; new vessels growing from it are what destroy central vision in wet macular degeneration.

Its parts

• Right choroid
• Left choroid

Related conditions

• Blepharitis & styes
• Cataract
• Chronic venous insufficiency
• Clotting disorders (thrombophilia & APS)
• Conjunctivitis
• Deep vein thrombosis
• Eye melanoma (uveal melanoma)
• Hyperthyroidism & Graves' disease
• Keratitis (corneal infection and ulcer)
• Keratoconus
• Presbyopia
• Retinal detachment
• Retinoblastoma
• Sjögren's disease
• Squint & lazy eye
• Uveitis & iritis
• Varicose veins