Does convex lens converge light rays?
Because a convex lens concentrates the light rays that are incident on it, it is called a converging lens. The bending of rays is maximal at the top and bottom of the lens. The distance from the optical center to the focal point is called the focal length of the lens.
Can vitamin D deficiency affect your eyes?
Lack of Vitamin D has been associated with eye diseases like uveitis, macular degeneration, and dry eye. Vitamin D deficiency is also linked to cancer, immune disorders, heart disease, high blood pressure, osteoporosis, bone pain, depression, asthma, multiple sclerosis, and even dementia.
How long does it take to recover from vitamin D deficiency?
The treatment dose of vitamin D depends on your age, how low your blood vitamin D level is, and what is causing the level to be low. Most often your doctor will lower the vitamin D dose after six to eight weeks of treatment.
What’s the side effects of low vitamin D?
Symptoms of vitamin D deficiency can include muscle weakness, pain, fatigue and depression. To get enough D, look to certain foods, supplements, and carefully planned sunlight….Signs and symptoms might include:
- Fatigue.
- Bone pain.
- Muscle weakness, muscle aches, or muscle cramps.
- Mood changes, like depression.
Does vitamin D deficiency make you sweat?
Excessive sweating, especially sweating of the head, can be a sign of a vitamin D deficiency. A change in the amount you sweat or your sweating patterns should be cause for concern.
Why is vitamin D so important to thyroid patients?
A different gene in the Vitamin D receptor was shown to predispose people to autoimmune thyroid disease including Graves’ disease and Hashimoto’s thyroiditis. Vitamin D inhibits the production of Th1 polarizing cytokine (IL-12), thereby indirectly shifting the polarization of T cells from a Th1 toward a Th2 phenotype.