“…Flame method determination of the main elements such as calcium, magnesium, sodium and potassium may be considered as routine analysis if the volume of the inves tigated samples is sufficient [3,4], In blood serum trace elements, i.e. copper, zinc, man ganese, lead, bismuth and cobalt, were also determined using a nonflame method [1,2,5,6,8,9], In our previous paper we presented the results of the determination of the main in organic constituents, among others trace ele ments, in the subretinal fluid (SRF) [10]. The relationship between the contents of each element in the SRF and blood serum was also presented there.…”