Explore Optometry. Home / Education / Admissions / Explore Optometry. A Doctor of Optometry (OD) is an independent, primary health care provider who examines the visual system, the eye and associated structures, as well as diagnoses, treats and manages related diseases and disorders. Optometry involves much more than prescribing and fitting glasses and contact lenses.
In most of the UK, when hard water is softened with water softener, the softened water is likely to comply with the Drinking Water Regulations, assuming that the concentration of sodium does not exceed 200 mg/l, it would be regarded as wholesome and therefore considered safe to drink over the long term.n most of the UK, when hard water is softened with water softener, the softened water is likely to comply with the Drinking Water Regulations, assuming that the concentration of sodium does not exceed 200 mg/l, it would be regarded as wholesome and therefore considered safe to drink over the long term.
Water softeners can be used to remove the calcium and magnesium from hard water by using sodium. Hard Water Features. There are pros and cons to both hard and soft water. Hard water typically tastes better because of the of minerals in it. That is why spring water and mineral water are bottled and touted as tasting good. Hard water is also shown to be beneficial for your health, because it is a good source of the magnesium and calcium your body needs.