"Permanent blindness" refers to a condition where a person is unable to see and this loss of vision cannot be reversed or cured. The individual will be blind for the rest of their life. Full definition
The longer the pressure in the eye is elevated, the more damage occurs to the structures in the eye responsible for vision, eventually resulting in permanent blindness. (ofora.com)
Any injury to your cat's eyes can potentially cause permanent blindness. (yourpetspace.info)
Contact with the eyes can lead to temporary or possibly permanent blindness. (ocgov.net)