The two major causes of visual disturbance in western countries are cataracts and macular degeneration (AMD). Both conditions are associated with aging and other pathologies such as diabetes and obesity. Another frequent disorder is dry eye syndrome, which is also associated with aging, the use of contact lenses and computers, the presence of air conditioning, some immunological diseases and some medications such as anti-depressants.
In the latter case, the treatment is done essentially using artificial tears. In the first two cases, prevention or slow progression is the best way to limit the impact on health and quality of life.
A study called AREDS recommends the use of supplements rich in antioxidant vitamins and zinc, decreasing the risk of progression of changes.
The antioxidants that must be present in a supplement that protects the visual system are: lutein, zeaxanthin, omega-3, trace elements and vitamins.
The presence of omega-3 also decreases the risk of developing dry eye symptoms.
Supplements containing B-carotene are contraindicated in smokers and those containing lactose in diabetics.
