Sclera

From Freepedia

The sclera is the white outer coating of the eye made of tough fibrin connective tissue which gives the eye its shape and helps to protect the delicate inner parts.

In children, it is thinner and shows some of the inlying blueness. There are some diseases like scleritis that cause some blindness. It appears that these diseases produce a dark vertical line through the eye sight which avoids the 100% of visibility.

Image:Schematic diagram of the human eye.png

Diseases and disorders

Main article: List of eye diseases and disorders

Image:Blue morpho butterfly.jpg

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Sensory system - Visual system - Eye	Edit
Optic disc - Retina - Cornea - Iris - Pupil - Lens - Macula - Sclera - Optic fovea - Blind spot - Vitreous humour - Aqueous humour - Choroid - Ciliary body - Conjunctiva - Angle structure - Tapetum lucidum