Your patient needs +2.00 D to see distance clearly. However, he can tolerate up to +4.00D without getting 
blurred distance vision. His cycloplegic refraction is +6.00D sphere. What are the values in dioptres of his:

a. absolute hypermetropia?

b. manifest hypermetropia?

c. facultative hypermetropia?

d. latent hypermetropia?