Health Sciences 3701A/B Chapter Notes -Intraocular Pressure, Aqueous Humour, Anterior Chamber Of Eyeball

• School: Western University
• Department: Health Sciences
• Course: Health Sciences 3701A/B
• Professor: Aleksandra Zecevic

Document Summary

Main structures of the eye: sclera- the outer layer of the eyeball/ white of the eye. Protects and shapes: cornea- transparent avascular layer of surface of eye that light enters through. Primary function is to bend light so that it focuses on the retina for maximum stimulation of photo receptors in the eye. Most vulnerable to damage: anterior and posterior chambers- the space between the cornea and the iris (anterior) and the iris and the lens (posterior). Both are filled with an aqueous humour or liquid that that brings nutrients to and waste from the lens and cornea. Flow of this humour is kept constant to maintain intraocular pressure. If it doesn"t drain, pressure increases damaging the retina and optic nerve which can result in glaucoma: iris- the colourful muscular sphincter suspended between the cornea and the lens. Controls how much light is let in through either dilation (opening) or constriction (closing) which changes the pupil size.