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.
- Supplements of vitamin A for night blindness: Vitamin A supplements could be necessary for people with vitamin A deficiency. It is usually taken as carotenoids. There is also vitamin A as cod liver oil or combinations of vitamin A and carotenoids. It can be taken in capsules, tablets or liquid.