Hi.. Retinal detachment has to be fixed by surgical procedures alone.. There are various forms of surgeries including open surgeries and laser techniques.. The amount of vision lost will depend on the amount and area of retina that is detached.. for example if the macular area is not detached and if no surgery is performed, vision may be fair, but not completely normal.. However the surgeries may improve the quality of vision.. The surgery does not involve the removal of eye ball..