How long does it take to lose eye sight through retinal detachment through direct trauma?
If you indeed have a retinal detachment, vision is unrecoverable within 20 minutes of the injury. Depending on what part of the retinal is damaged, you may or may not notice vision loss since the acute vision center is located in the fovea of the eye which accounts for less than 5% of the total surface area of the retina. If untreated the retinal detachment can continue to tear and may eventually affect the entire eye and will result in permanent vision loss. If you suspect that your recent injury may have caused a retinal detachment (symptoms would be excessive floaters and flashes of light longer than 15 minutes), then you need to see a retinal specialist asap. The longer you wait, the higher the risk for a poor prognosis.
