If you are doing weight lifting on a very frequent basis, then it probably increases the risk of getting some eye problems such as eye floaters and glaucoma. Glaucoma is a very serious eye disease which is the leading cause to vision loss with no cure. Glaucoma refers to increased intraocular pressure which would damage optic nerve endings. Weight lifting would temporarily increase the intraocular pressure. If you do it on a daily basis, then it put you at a much higher risk of developing glaucoma. It is just like vomiting or coughing, which can also cause temporary pressure increasing in eyes. During weight lifting, air is forced into the narrow windpipe which causes pressure increasing in human body. If you need to do it anyway frequently, then I suggest you to stay away from caffeine and smoking, which are triggers for temporary IOP increasing too. Visit your eye specialist on a frequent basis to monitor the IOP if any treatment needed to lower the pressure.