Evaluation of the anterior segment parameters after Nd: YAG laser Capsulotomy: Effect the design of intraocular lens Haptic

Abstract

Objective:To evaluate the changes in anterior segment parameters after neodymium–yttrium-aluminum-garnet (Nd:YAG) laser capsulotomy in 1-piece and 3-piece IOLs.Methods:In an institution, 65 eyes of 65 consecutive pseudophakic patients with posterior capsule opacification underwent Nd:YAG laser capsulotomy. The patients were divided into two groups according to the IOL type. Group-1 consisted of 35 subjects with 1-piece IOL and Group-2 consisted of 30 subjects with 3-piece IOL. Anterior segment parameters were measured with the Sirius rotating camera before, one week and one month after Nd:YAG laser capsulotomy.Results:Mean age was 72.3±5.2 years in 1-piece IOL and 72.3±6.8 years in 3-piece IOL. There were no statistically significant differences before capsulotomy for IOP, axial length, spherical equivalent, anterior chamber depth, central corneal thickness, anterior chamber angle and anterior chamber volume between two IOL groups. BCVA improved after capsulotomy in both groups (p=0.001). Both IOL groups had statistically significant myopic shift compared with the baseline values (P= 0.03 and P=0.01 resp.). Both IOL groups had statistically significant decrease in ACD, from baseline to the 1st week and 1st month (p=0.04 and 0.03 resp.).Conclusion:To achieve the highest percentage of refractive and anterior segment stability surgeons may prefer to implant the 1-piece IOL design.

Effects of Nd: YAG Laser Capsulotomy on Visual Acuity, Central Macular Thickness, Intraocular Pressure and Refraction in Patients with Diabetes Mellitus

“…Studies in the literature reported an increase of 15-30% in IOP despite prophylactic treatment (25)(26). However, Ozkurt et al reported no significant change in IOP after YAG PC (27). In this study, despite prophylactic treatment, IOP was measured between 40-46 mmHg in 2 cases in Group 1; it was brought under control at the end of the first month.…”

Refractive Changes After Nd:YAG Capsulotomy in Pseudophakic Eyes

“… 29 On the other hand, Akmaz et al found a significant myopic change in spherical error in the single- and three-piece lens groups and a significant myopic change in SE in the three-piece lens group. 27 …”

“…[11][12][13][14][15][16][17][18][19][20][21][22] Three studies noted a hyperopic shift after the procedure, [23][24][25] while two observed a myopic change. 26,27 Many of these studies do not assess cylinder independently. Of the six that did, only two noticed a statistical change in cylinder at the latest follow-up visit, with both of those changes decreasing in magnitude, 26,28 supporting our results.…”

“…29 On the other hand, Akmaz et al found a significant myopic change in spherical error in the single-and three-piece lens groups and a significant myopic change in SE in the three-piece lens group. 27 LALs specifically have not been thoroughly evaluated in YAG capsulotomy procedures. While classified as a threepiece lens, LALs have an adjustable refractive power after surgery, 30 which is in stark contrast to non-adjustable IOLs.…”