Abstract
Cataract surgery can cause macular thickness change. We used optical coherence tomography (OCT) to assess the macular thickness of different regions after femtosecond laser–assisted cataract surgery of age-related cataracts (ARC) and myopia cases with cataract (myopia group). Fifty eyes of 50 patients in ARC group and fifty eyes of 50 patients in myopia with cataract group were included. All study underwent femtosecond laser–assisted cataract surgery and macular thickness of was measured at pre-operation and 1 week, 1 month after surgery. There are significant differences of foveal thickness (P = 0.02), foveal volume (P = 0.02) and average retinal thickness (P = 0.02) between two groups before operation. In the myopia group, statistically significant differences were not found in postoperative macular thickness as compared with ARC group. There are differences in macular thickness between pre-operation and 1 month after operation when compared with nasal outer macular ring thickness (P = 0.022), foveal volume (P = 0.005) and average retinal thickness (P = 0.012) in ARC group. The study suggest that femtosecond laser–assisted cataract extraction is safe in myopia group that did not cause significant increase of macular thickness. However, an increased post-operative local macular thickness was recoded while comparing macular thickness with the baseline in ARC group.
Highlights
The subclinical macular edema after common and complex cataract surgery has brought substantial attention to surgeons due to the potential hazard of this complication to vision consequence[1,2]
We described them as superior outer macular ring thickness (SOMRT), bitamporal outer macular ring thickness (BOMRT), inferior outer macular ring thickness (IOMRT), nasal outer macular ring thickness (NOMRT), superior inter macular ring thickness (SIMRT), bitamporal inter macular ring thickness (BIMRT), inferior inter macular ring thickness (IIMRT), nasal inter macular ring thickness (NIMRT), foveal thickness (FT), foveal volume (FV) and average retinal thickness (ART)
The macular thicknesses measured in FT, FV and ART in myopia group are significantly higher than the age-related cataracts (ARC) group in the baseline measurement
Summary
The subclinical macular edema after common and complex cataract surgery has brought substantial attention to surgeons due to the potential hazard of this complication to vision consequence[1,2]. Macular pulled by vitreous may play a vital role for formation of subclinical macular edema These findings support the notion that myopic eyes are more prone to macular edema formation after cataract surgery. It is warranted for further study whether it is the case in femtosecond laser-assisted cataract surgery. A report showed that the suction ring causes temporally increase of intraocular pressure (IOP) during the vacuum aspiration (up to 40 mmHg in the LenSx laser system, Alcon Lasers, Inc.)[6], which can induce various changes from anterior segment to posterior segment of ocular structure[7]. The information of retinal thickness changes after the cataract operation especially for myopic eyes can provide insight to pathophysiology of subclinical macular edema occurring
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