20 weeks of 2018
As age increases, the incidence of bad eye symptoms will become more frequent. Early action is an excellent way to protect eyesight. According to the National Institute of Health (NH) National Institute of Ophthalmology, the incidence of age-related macular degeneration (AMD) increases significantly after 40 years of age, and there is also a certain association between sex and race and incidence. Statistics show that under the influence of gender and ethnicity, 15% of white women over 80 years old are affected by AMD.
Research shows that nutrition is a key factor in maintaining eye health with age. In addition to lutein and related macular carotenoids, Omega-3 fatty acids and alpha- lipoic acid also play an important role in protecting eyesight of patients with eye disease. Next, let Xiaobian focus on some of the latest research.
Alpha- lipoic acid and AMD
Researchers from Shandong University recently evaluated the role of alpha- lipoic acid in dry AMD. Dry AMD is the most common AMD disease at present. It is characterized by the formation of yellow fat deposits known as verruca vitreous in the retina, and the gradual decomposition of photoreceptors on the retina. Because alpha- lipoic acid is known for its antioxidant effect, researchers believe that it is an ideal choice to reduce oxidative stress in ocular tissues.
In this study, the researchers randomly divided 100 60-83 - year - old dry AMD patients into two groups, one taking alpha- lipoic acid (200 mg / day), and a group as a control group, taking vitamin C (1 g / day). The test lasted 3 months. Serum superoxide dismutase (SOD) activity is the key method to measure the antioxidant capacity, alpha- lipoic acid and visual acuity. The results showed that the quality of life associated with vision and vision in the alpha- lipoic acid group was significantly higher than that of the control group, which further demonstrated the benefits of alpha- lipoic acid to AMD.
Omega-3s and dry eyes
Researchers have previously evaluated the effects of Omega--3 fatty acids on dry eyes and tears. Many people have experienced dry eye symptoms, such as immune system disorders, eye surgery, contact use, drug treatment and many other factors can lead to dry eyes. In a multiple, randomized, double-blind, placebo-controlled study, researchers from the Ohio State University randomly divided 105 people diagnosed with dry eye disease into two groups, a group of 1680 mg of EPA+560 mg of DHA a day, and a group of 3136 milligrams of linoleic acid each day for a period of 12 weeks.
The results show that Omega-3 fatty acids can significantly improve dry eye symptoms, including a reduction in tear osmotic pressure (a sensitive biomarker of dry eye), increased time for tear dispersion, reduced inflammation on the eye surface, and an improvement in the eye surface disease index, one of the important indicators for measuring the symptoms of chronic dry eyes. The results suggest that Omega-3 fatty acids have important benefits for people with dry eye.
Xanthophyll, zeaxanthin and AMD
Evidence of lutein and zeaxanthin on the health benefits of macular degeneration is increasing. In a recent study, researchers from the Affiliated Hospital of Zhongshan Medical University had 56 healthy early AMD patients aged 30-50 years old with a daily intake of calendula and wolfberry drinks (12 grams of lutein and 2 milligrams of zeaxanthin) for a period of 5 months.
The researchers found that the total free radicals in the body decreased significantly after the intake of the drink, and the levels of antioxidant capacity, glutinone and antioxidant enzymes increased significantly. The level of C- reactive protein (hs-CRP), an inflammatory response factor, has also been reduced. In addition, the daily intake of lutein and zeaxanthin can significantly improve the optical density (MPOD) and visual accuracy of the macular pigment, reduce the intraocular pressure and improve the recovery of light stress. In general, lutein and zeaxanthin are good for eye health and can enhance the antioxidant and anti-inflammatory properties of ocular tissues.
Lutein and diabetic patients' vision health
Diabetic retinopathy is a common cause of blindness and visual impairment. It is characterized by oxidative damage that causes lipid peroxidation on the retina, and is the result of high glucose level and high metabolic activity in the retina. In a randomized study conducted by researchers at the Xi'an Jiao Tong University's Center for Health Sciences, 31 diabetic patients with diabetic retinopathy were randomly divided into two groups, a group of 10 milligrams of lutein a day, and a placebo group for 36 weeks. In the experiment, the volunteers evaluated their visual parameters, including visual acuity, contrast sensitivity and glare sensitivity.
The results showed that in the lutein group, the visual acuity and glare sensitivity of the volunteers increased, but the improvement rate was not statistically significant. However, the visual contrast sensitivity of the volunteers in the lutein group was significantly improved, suggesting that lutein could improve the visual function of diabetic retinopathy.
May 18, 2018
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