Presbyopia is a condition associated with aging of the eye that results in progressively worsening ability to focus clearly on close objects.
Cause of presbyopia
1. The muscles which change the thickness of the lens in the eye decline and focus can’t be adjusted.
2. The lens itself becomes too hard to compress and focus can’t be adjusted.
Presbyopia and cataract
Progression of presbyopia can cause cataract because lens becomes cloudy at the same time as becoming hard.
The occurrence ratio of cataract is 40 % at the age of 50s and almost 100 % at the age of 80s.
The substance which prevents cataract is Lutein. Lutein prevents lens from becoming cloudy and hard.
Food to suppress the progression of presbyopia
The food is Spinach.
Content of lutein within 100 grams of spinach is 10 mg (Broccoli: 1.9 mg, Leaf lettuce: 1.8 mg).
Lutein required for a day is 6 mg which is 2 bunches of spinach.
Lutein is oil soluble so if it is eaten with oil, the absorption of lutein is better.