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.
Whole milk is a good source of vitamin A. Problems with the retina is usually the cause of night blindness. One cause of night blindness is cataracts, which is more common in individuals over 50 years of age. Those who are nearsighted can see nearby objects but things that are far away appear blurry.