Cornea

Looks like

The clear front window of the eye, half a millimetre thick, with no blood supply of its own.

What it does

Does most of the eye's focusing and keeps the inside safe.

Keeping it well

Take contact lenses out at night, protect from UV and injury; a red painful eye with blurred vision is an emergency.

Its parts

• Right cornea
• Left cornea

Related conditions

• Blepharitis & styes
• Cataract
• Conjunctivitis
• Corneal abrasion (scratched eye)
• Dry eye disease
• Hyperthyroidism & Graves' disease
• Keratitis (corneal infection and ulcer)
• Keratoconus
• Onchocerciasis (river blindness)
• Presbyopia
• Pterygium (surfer's eye)
• Retinal detachment
• Retinoblastoma
• Short and long sight (refractive error)
• Sjögren's disease
• Squint & lazy eye
• Trachoma
• Uveitis & iritis