A 47-year-old patient presents

to the emergency of Department of Ophthalmology. He sees iridescent circles

around lights, and his overall vision is impaired and blurry. He has a

headache. When looking at the affected eye, the conjunctiva is red. The pupil

is mydriatic (dilated) and elevated intraocular pressure is present during the

basic eye examination. This patient presents with one of the most acute

conditions in ophthalmology, namely, an acute attack of glaucoma. The

underlying mechanism of acute glaucoma attack is complete circular occlusion

(closure) of the iris-corneal outflow tract on the anterior surface of the

peripheral iris. Thus, there is accumulation of humour aqueous in the chambers

and intraocular pressure increases. Where the humour aqueous is produced in the

eye?