hypermetropia and prism

What is the difference between hypermetropia and presbyopia ?

Farsightedness (Hypermetropia) and Nearsightedness (Myopia).

What is hypermetropia or farsightedness ? What are the possible reasons of hypermetropia ? How is hypermetropia corrected ? Explain with figures .

In hypermetropia, the image is formed

Differentiate between myopia and hypermetropia. What type of spectacles should be worn by a person having the defects of myopia as well as hypermetropia ?

Long-sightedness is to hypermetropia as short-sightedness is to

Which lens is used for the correction of hypermetropia ? And why ?

What type of lens is used to correct (a) hypermetropia (b) myopia ?