Which is the light sensitive layer of the eyeball? Where exactly is the image formed on this layer?

Study the diagram given below and answer the questions that follow :

(a) Identify the defect of the eye by mentioning the technical term.

(b) Mention one reason for this defect.

(c) Name the type of lens used to correct this defect.

Name the endocrine gland that secretes Thyroxine. Give any one function of Thyroxine.

Give the full form of the abbreviation ACTH. Which gland secretes this hormone?