To investigate the effect of anterior chamber depth(ACD) on intraocular lens(IOL) position.

This was a retrospective study.The clinical data of 134 eyes of 119 cases with femtosecond laser-assisted phacoemulsification and IOL implantation from Jan.to Dec.2018 in Guangzhou Aier Eye Hospital were collected.Based on the preoperative ACD, the patients were divided into 3 groups: group A with 55 eyes of 48 cases, shallow anterior chamber group (ACD<2.5 mm); group B with 52 eyes of 50 cases, normal deep anterior chamber group (2.5≤ACD≤3.0 mm); group C with 27 eyes of 23 cases, deep anterior chamber group (ACD>3.0 mm). The follow up time was 1 month after surgery.The relationship between postoperative ACD change, diopter change and preoperative ACD in each group were analyzed, and the relationship between preoperative IOL diopter reserve and preoperative ACD was discussed.

At 1 week after surgery, the ACD in group A was deepened by (1.77±0.62) mm, which was deepened by (1.33±0.42) mm in group B; which was deepened by (1.34±0.50) mm in group C. At 1 week and 1 month after the surgery, the difference in the degree of ACD deepening between group A and group B, group A and group C was statistically significant (all P<0.05), and the difference between group B and group C was not statistically significant (allP>0.05). After the diopter change, group A showed hyperopia shift, group B and group C showed myopia shift.

In phacoemulsification surgery for cataract, preoperative shallow anterior chamber patients have the largest change on the position of the intraocular lens.As time goes by, the position of the intraocular lens is shift, the performance of hyperopia shift.In shallow anterior chamber, the choice of intraocular lens diopter should be increased by+ 0.50D-+ 0.75 D on the basis of the calculated results.Normal ACD and deep chamber can be selected as usual.

Depth, anterior chamber; Position, lens, intraocular; Surgery, cataract