Eye anatomy

Description

Describe the structure and function of the fibrous tunic, including the roles of both the cornea and the sclera, and explain how the cornea manages to receive nourishment despite being avascular.Explain the anatomical relationship between the cornea, iris, and anterior chamber, and discuss the role of the cornea in focusing light onto the retina.Discuss the anatomical features and functions of the sclera, including its relationship with the cornea at the corneoscleral junction (limbus) and its importance in providing structural support and protection for the eye.Describe the components of the vascular tunic (uvea), detailing the specific roles of the iris, ciliary body, and choroid in regulating light entry, producing aqueous humor, accommodating the lens, and supplying nutrients to the retina.Explain the mechanisms by which the iris controls the size of the pupil and regulates the amount of light entering the eye, and describe how the pigmentation of the iris determines eye color.