Complications include secondary cataract, iris rubeosis, uveitis, secondary glaucoma and, eventually, phthisis bulbi. Once damaged, there are greatly increased chances of infectious diseases such as bronchitis, pneumonia, and tuberculosis (or phthisis as it was called then) superimposing themselves.
There was so much load, the muscles were pulling so hard, the force went somewhere and a rip/tear of some size happened. Symptoms of a pulled back muscle include (sorry, some of these are obvious): ** Pain, in a specific spot and/or referred pain elsewhere. ** Pain on movement, including taking a deep breath.
Pulled muscle symptoms can be the same for a tweak, strain, or tear. Just because it's severe, debilitating pain doesn't necessarily mean that you have a 'bad' injury'. A tweak can be just as debilitating as a tear, depending on how your system is responding.