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Observation of retinal thickness before and after laser photocoagulation in macular edema
£ÛAbstract£Ý Objective To observe the changes of the central retinal thickness before and after photocoagulation using the Optical Coherence Tomography £¨OCT£©in macular edema.Methods OCT was performed in 21 patients £¨28 eyes£© before and 3 months after grid photocoagulation.Measurement was done for the average retinal thickness within a diameter of 4 mm to the fovea center.Results There was significant statistical difference between pre-treatment and 3 months of the average retinal thickness within a diameter of 1 mm and 1~2.22 mm area£¨P<0.05£©.In the 2.22~3.45 mm diameter zone,the difference before and after the treatment was not statistically significant£¨P>0.05£©.Conclusion The thickness of the sensory retina at the macular area decreased after the grid laser treatment at the post treatment period of 3 months.The closer to the fovea,the more therapeutic effect was shown for the treatment.OCT play a very important role in the treatment and follow up for macular edema.
£ÛKey words£Ý optical coherence tomography£»macular edema£»laser photocoagulation£»retinal thickness
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