Miranda, the dream you described is quite vivid and emotionally charged. The image of your 13-year-old autistic son, whom you never see, being in an abandoned house with his eyeball hanging out and his face scratched up and bloody, is profoundly disturbing and laden with potential symbolism. Firstly, the abandoned house often represents feelings of neglect or abandonment in one's life. Given your recurring stressors and frequent feelings of sadness, this setting might reflect your own feelings of being left alone to deal with overwhelming situations.
The presence of your son, particularly with the context of his autism and the fact that you rarely see him, could symbolize a part of your life or emotions that you feel disconnected from or unable to fully reach. This could be connected to your own inner child, perhaps highlighting unresolved issues or trauma from your past that still impact you. The fact that he is injured, especially in such a graphic manner, might be a manifestation of your deep-seated fears and anxieties about his wellbeing or your own ability to protect and nurture those you care about.
The specific details of his injuries - his eyeball hanging out and his face scratched up and bloody - are particularly striking. These injuries could symbolize a perceived inability to 'see' situations clearly or a fear of facing harsh realities. The damage to the face can also reflect a sense of losing identity or being attacked on a deeply personal level.