Cataract, which is similar to the symptoms of presbyopia

Symptoms appear and may perhaps presbyopia appeared, I think trying to presbyopia correction.
However, you need to make sure whether their symptoms properly due to presbyopia thing really.
Because, it is because the symptoms if you get a cataract, is very similar to presbyopia.

Presbyopia symptoms appear to see things for adjusting force is reduced.
Adjustment rather than force, cataract, it is caused by the change of the lens on it.
Cataract is a disease in which the lens is cloudy it is aging.
When the lens aging, changes occur in the protein.
By it, or cloudy, or curing, some amino acids of the protein is broken down by light, or yellow discoloration.
Such a change of the lens is not the only cause aging, genetics and medicine some cases, radiation, ultraviolet light is due.

There are also cases that other diseases will lead to cataract.
Diabetes, and the like as a typical disease in this case.
Other causes may also decrease in the sodium and calcium is a component required for the lens leads to cataract.

Cataract is said to be developing at a rate of 30% in people in their 40s.
I is said to increase the incidence increases as the age, becomes his 80s, and nearly everyone has been developed.

The symptoms of cataract, it feel bright vision loss and blurred vision, light, dark feel to the contrary, see double, and the like.
Whereas presbyopia makes difficult to focus of eyes, cataract things look hazy is the difference of the main symptoms.
If no effect is seen even after correcting presbyopia, you might want to remember that there is a possibility of cataract.