Vitamin deficiency.
Vitamin A or beta-carotene, a precursor of vitamin A.
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The first symptom of vitamin A deficiency is night blindness. The groups at risk of suffering vitamin A deficiency are mainly this:
Pregnant and lactating women, newborns, children with frequent infections.
Older people and people who avoid foods of animal origin.
Tips for Eye Health in Adults 40 and up
Exercise
Our eyes need good blood circulation and oxygen intake, and both are stimulated by regular exercise. Regular exercise also helps keep our weight in the normal range, which reduces the risk of diabetes and of diabetic retinopathy. Gentler exercise, including walking, yoga, tai chi, or stretching and breathing, can also be effective ways to keep healthy. Remember to use sun safety and protective eyewear when enjoying sports and recreation.
Sleep
As we sleep, our eyes enjoy continuous lubrication. Also during sleep the eyes clear out irritants such as dust, allergens, or smoke that may have accumulated during the day.
Some research suggests that light-sensitive cells in the eye are important to our ability to regulate our wake-sleep cycles. This becomes more crucial as we age, when more people have problems with insomnia. While it’s important that we protect our eyes from over-exposure to UV light, our eyes also need exposure to some natural light every day to help maintain normal sleep-wake cycles.
Normal Vision Development in Adults Under 40
Eye and vision system development are complete by the early 20s and normally remain steady through the 30s, although women may experience vision fluctuations during pregnancy. Eyeglass or contact lens prescriptions change only slightly or not at all during this life stage. For this reason, if a person is considering LASIK or other refractive surgery for vision correction, this would be a reasonable time to have the surgery. Like any surgery, LASIK has both benefits and risks. Research your options carefully before making a decision.
People who are diabetic or pre-diabetic need to have regular eye exams and work with their doctors to control weight and blood sugar as well as blood pressure and cholesterol.
Sunglasses: Protection from UV Eye Damage
A number of scientific studies indicate that spending long hours in the sun without eye protection can damage your eyes by contributing to cataracts and growths on the eye, including cancer.
Based on these studies, ophthalmologists recommend that you wear 99 percent and higher UV (ultraviolet radiation)-absorbent sunglasses and a brimmed hat whenever you’re in the sun for long periods of time.
Proper sunglasses are key to protecting your eyes from sun-related damage, and they should be worn anytime you are outdoors.
