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.
1 Have your water softener bypass the water supply that goes to your kitchen tap (or wherever you normally get your drinking water). 2  Try a salt free water conditioner to address your hard water problems rather than a traditional salt-using system.3  Buy bottled water from the store (in a reusable container, please).hy Thereâs a Debate Over Softened Water. Conventional water softeners use salt to extract the problematic minerals from hard water. Unfortunately, the process leaves behind sodium in place of those hard water minerals. The harder your water is, the more sodium is added to it through the softening process.