Before turning to the examination of the eye, its anatomy must be understood. The cross-section of the eye Zonulafasern hold the lens in place, while the muscles of the ciliary body are responsible for the accommodation. The ciliary body secretes aqueous humor, which fills the anterior and posterior chamber. It passes through the pupil into the anterior chamber and flows mainly through the Schlemm’s canal again (aqueous humor production and flow.). The iris controls the amount of light by changing the pupil size. What is seen is focused on the retina. The conjunctiva covering the eyeball and dresses the upper and lower lid from the inside. It ends at the limbus. The cornea is covered with an epithelium of the conjunctiva is different and is more sensitive.