title: Tear calcium levels in normal subjects.
abstract: Tear calcium contents were measured in 30 normal subjects divided into six groups of 5 individuals each, age ranging from the second to the seventh decade. No significant difference was found among the age groups. A mean of 4.40 mg of calcium/100 ml was determined for the 30 subjects with a standard deviation of 1.22 and a range 2.60-7.60 mg/100 ml. The tear calcium as percentage of the serum calcium was similar in the six groups and a mean of 45.68 was found for the 30 subjects. This figure is quite similar to that of serum ionised calcium as percentage of the total serum calcium values obtained by different authors.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002118:Calcium / Q000032:analysis* / Q000097:blood; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013054:Spectrophotometry, Atomic; D013666:Tears / Q000032:analysis*
chemical_list: D002118:Calcium