0.05).There was no significant variations of the parameters of newborns according to different levels of maternal serum ferritin. It has been shown that the iron status of mother does not affect the iron status of the infant. Fetus can draw enough iron to satisfy its need for growth and development, and this may cause iron deficiency in the mother. So, prophylaxis of iron deficiency during pregnancy is indicated.

The therapeutic trial of iron on 114 preschool children was studied. Before and after the trial, the iron status of the children was determined by measuring hemoglobin, free erythrocyte protoporphyrin, the ratio of free erythrocyte protoporphyrin/hemoglobin, serum iron, transferrin, transferria saturation, and serum ferritin. All of the children were given a two-month course of ferrous sulfate (4mg iron/kg/ day orally). The iron status of 4 years age group was superior to the 1-4 years group before the therapeutic trial. But after the trial, the iron status of these two groups was very significantly improved, all of the parameters of each group reached at the same levels. Those children with mean value of hemoglobin 3?g/g had good response. Of the 114 children 70 were iron deficient (61.4%), 83 had an increase in venous hemoglobin greater than 0.5g/dl after the trial (72.8%). Since the therapeutic trial is more economical and simpler so we favor to give the trial among the preschool children whose hemoglobin is below 12g/dl and/ or free erythrocyte protophyrin/hemoglobin ratio greater than 3?g/g, in order to avoid missing the iron-responsive individuals.

3,= 4, the sensitivity and specificity in predicting response before iron administration were 77.4, 47.5; 71.7, 75.4; 52.8, 90.2; 18.9, 96.7 respectively. Both sensitivity and specificity were higher in two parameters combined, so that the two parameters combined to screen iron deficiency would be better. Because both sensitivity and specificity were higher in Hb and FEP/Hb, so we prefer Hb and FEP measurement for screening iron deficiency.

AIM:To investigate the visual quality and stereopsis after the implantation of PanOptix trifocal intraocular lens(TFNT00).METHODS: A prospective clinical study was conducted. A total of 36 cataract patients(50 eyes)who underwent phacoemulsification combined with TFNT00 implantation in Jinan Mingshui Eye Hospital from November 2022 to April 2024 were selected. They were followed up until 3 mo after the operation. The uncorrected distance visual acuity(UCDVA), uncorrected intermediate visual acuity(UCIVA), uncorrected near visual acuity(UCNVA), objective scatter index(OSI), modulation transfer function cut off(MTF-cut-off), Strehl ratio(SR)and 100%, 20%, 9% contrast visual acuity(CVA)were observed. The binoptometer was used to collect the patients' far and near stereopsis acuities. The defocus curve was drawn after the operation; the Chinese version of the VF-14 Visual Function Index Scale was used to evaluate the visual quality and satisfaction after the operation.RESULTS: There were statistically significant differences in the UCDVA, UCIVA and UCNVA of the patients at different time after the operation(all P<0.05). The transition of the defocus curve was gentle between +0.5--3.0 D after the operation. The OSI value at 3 mo postoperatively after the operation was significantly lower than that before the operation(P<0.01), and the MTF-cut-off, SR, 100% CVA, 20% CVA and 9% CVA were significantly improved than those before operation(all P<0.01). The far and near stereopsis acuities of 34 patients were abnormal before the operation. The far stereopsis acuities of the patients who underwent bilateral eye surgeries were all normal after the operation, and the near stereopsis acuity of 12 patients was normal. Among the patients who underwent unilateral eye surgeries, the far stereopsis acuities of 13 patients were normal, and the near stereopsis acuities of 11 patients were normal. The far and near stereopsis acuities of the patients who underwent bilateral eye surgeries were significantly better than those patients who underwent unilateral eye surgeries.CONCLUSION: The PanOptix trifocal intraocular lens can provide patients with good full-range visual acuity. The stereopsis of the patients with bilateral implants is better than that of the patients with unilateral implants. The overall visual quality and satisfaction of the patients after the operation are relatively high.