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.
In fact, one of the first signs of vitamin A deficiency is poor night vision, and if left untreated, vitamin A deficiency can lead to blindness. Vitamin A supports skin cells and the development of healthy bone tissue. Vitamin A is also a required nutrient for healthy immune system functioning.