Dear pat2000,
A vitreous detachment should not cause blindness; however, it can if a retinal detachment ensues. It is important to get checked by an eyeMD.
Dr. Feldman
Sandy T. Feldman, M.D., M.S.
ClearView Eye and Laser Medical Center
San Diego, California
NO, unless during the vitreous detachment process it causes a retinal tear/detachment.