There are five types of presbyopia:
Premature presbyopia: Presbyopia happening before the age of 40 years.
Incipient presbyopia: Earliest stage when it becomes difficult to read small prints.
Functional presbyopia: More problems with near sight.
Absolute presbyopia: Eyes cannot focus on near objects at all.
Nocturnal presbyopia: Eyes cannot focus on near objects in low light conditions.
For presbyopia correction, the doctor will first test your eyes for the severity and will then suggest the right treatment.