If you still have difficulty seeing after having a cataract, it is important to distinguish whether you have difficulty seeing near or far, and to have an optometry to see if there is a certain amount of residual refraction. When you have a cataract, you can choose the number of crystalline lenses according to your needs, and you can either keep part of your near vision to resist presbyopia, or you can have a full correction to ensure your vision at a distance. If full correction is used to ensure long distance vision, presbyopia will occur when looking close and presbyopic glasses will be needed to see clearly. If myopia is retained to ensure clear vision in the near, but not in the distance, it is necessary to determine the cause of the difficulty in seeing according to their own situation. If it has been a long time since the surgery, and there is difficulty in seeing, it may be a posterior cataract, and the posterior capsule of the lens has become cloudy, so laser treatment can be performed to cut the posterior capsule, and the vision will be improved.