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.
Filtering water at home. Water treatment in the UK means that the water from your tap is safe to drink. However, the water is not pure because it contains dissolved mineral ions and chlorine. Some people prefer to filter their water rather than use it straight from the tap. Filtering removes impurities and this can improve the taste and quality of the water. Filtering also helps to soften the water. Commercially-available systems use cartridges containing water filters. These may be fitted in jugs or kettles, or plumbed in to the home water supply pipework.