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.
By Dr Ananya Mandal, MD. Vitamin A is required for several vital functions in the body. Some of the most important functions of Vitamin A are described below. Vitamin A is required for the maintenance of normal vision. A deficiency in vitamin A can lead to visual disturbances.