1 A mathematical determination of the amount or number of something: finding ways of saving money involves complicated calculations [mass noun]: the calculation of depreciation. More example sentences. Synonyms. 1  Precise mathematical calculations are worked out and this determines how a person's life is affected.
A vitamin A deficiency can lead to a vision condition called, Keratomalacia. Symptoms of this condition include: night blindness, dry eyes (often extreme cases), blurred or clouded vision, and softening of the cornea.
A magnesium deficiency will not cause blurry vision, but other conditions may. If you experience gradual changes in your vision, it could indicate the need for a new eyeglass prescription, or you may have an eye condition such as cataracts or glaucoma.