High intakes of vitamin B6 from food sources have not been reported to cause adverse effects [1]. However, chronic administration of 1â6 g oral pyridoxine per day for 12â40 months can cause severe and progressive sensory neuropathy characterized by ataxia (loss of control of bodily movements) [7,29-32].
Accommodative insufficiency (AI) is a condition in which people find it difficult to focus on near objects, to an extent which is unusually poor for their age group.The condition can occur in young people and children, and it is not caused by a problem with the lens of the eye.his means that accommodative insufficiency is different from the disorder known as presbyopia, commonly seen in people over the age of 40. In presbyopia, the lens loses its elasticity and its ability to adapt for near focusing.
What is Chronic V enous Insufficiency (CVI)? Chronic venous insufficiency (CVI) is a common cause ofleg pain and swelling, and is commonly associated withvaricose veins. It occurs when the valves of the veins donot function properly, and the circulation of blood in theleg veins is impaired.CVI may affect up to 20 percentof adults.hronic venous insufficiency (CVI) is a common cause of. leg pain and swelling, and is commonly associated with. varicose veins. It occurs when the valves of the veins do. not function properly, and the circulation of blood in the. leg veins is impaired.