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.
An overdose of vitamin A can cause serious or life-threatening side effects. Do not take vitamin A without medical advice if you are pregnant. Vitamin A can cause birth defects if taken in large doses. Before taking vitamin A, tell your doctor about all other medicines you use.