Change in choroidal thickness and the relationship with accommodation following myopic excimer laser surgery

Abstract

Purpose To investigate early changes in choroidal thickness (CT) and the relationship with accommodation after myopic excimer laser surgery. Methods We enrolled the right eye of 70 patients with myopia and without other ophthalmic or systemic diseases who were suitable for myopic excimer laser surgery. The CT was measured at the fovea and at distances of 0.5 and 2.5 mm for the following: nasal; temporal; superior; and inferior to the fovea preoperatively and at 1 month postoperatively. Other data collected included demographic information (age, sex, and refractive error), the amplitude of accommodation (AA), intraocular pressure, axial length, corneal thickness, and surgical parameters. The data were analyzed with a paired Student's t-test, stepwise linear regression, and correlation analysis. Results The CT was significantly thicker postoperatively compared with the preoperative CT. The AA significantly decreased postoperatively. The change in the AA was the most significant factor associated with the change in the CT at the fovea. Except for 2.5 mm inferior to the fovea, the increase in the CT at other locations was positively correlated with the decrease in the AA. Conclusions The CT increased following myopic excimer laser surgery and the change was most obvious when accompanied by a decrease in the AA early after the surgery.

Short Term Changes in Anterior Segment and Retina After Small Incision Lenticule Extraction

“…CT was observed thicker postoperatively [16], and there is research believing CT was affected by ciliary muscle contraction, which may explain why LT thickened. While in our research, results were similar, but not every measure point was statistically signi cant.…”

“…In our study, a slightly positive correlation between LT and sphere suggested that higher myopia had less AA, which may explain that some patients complained of accommodation hysteresis after surgery, especially in high myopia patients. The poor accommodative facility, slow accommodative responsiveness, and increased accommodation demand may attribute to the result [16].…”

Short-Term Changes in the Anterior Segment and Retina after Small Incision Lenticule Extraction

“…In our study, a slightly positive correlation between LT and sphere suggested that severe myopia had less AA, which may explain that some patients complained of accommodation hysteresis after surgery, especially highly myopic patients. The poor accommodative ability, slow accommodative responsiveness, and increased accommodation demand may attribute to these results [16].…”

Choroidal thickness changes following cataract surgery using swept source optical coherence tomography

“…1,2 In addition to diseases, ocular surgeries such as vitrectomy, scleral buckling, myopic excimer laser surgery, and trabeculectomy cause changes in the thickness of choroid. [3][4][5][6] However, the data on the change in choroidal thickness after phacoemulsifcation cataract surgery are not clear. Some studies have reported an increase, 7 whereas others have reported no change in choroidal thickness.…”