This is a frequently asked question by patients and is briefly described as follows: Diabetic patients with clinically diagnosed retinopathy of stage 3 or 4 or more are recommended to undergo fundus laser treatment. Laser photocoagulation reduces the risk of hemorrhage and retinal detachment by producing a concentrated spot on the retina and reducing the substances that stimulate neovascularization. In addition, photocoagulation of the macula reduces macular edema. All of these are able to stop vision loss or even improve vision, and currently the percentage of patients with improved vision increases somewhat when combined with intravitreal injections of drugs. However, it is important to note that the purpose of photocoagulation is to prevent blindness and that vision usually does not improve and may decrease slightly in most cases. In addition, many patients may experience a transient blurring of vision for a few hours after photocoagulation therapy, but vision can then be restored. Occasionally, some patients with early diabetic maculopathy may have improved vision after photocoagulation. Vision problems after photocoagulation for diabetic retinopathy are likely to cease in the long run because the retinopathy is controlled after photocoagulation, i.e., vision is indirectly preserved. Studies have shown that blindness due to diabetic retinopathy can be avoided in more than 60% of eyes if treated with timely photocoagulation, especially if the blood glucose is well controlled. Photocoagulation is recommended.