There is a connection between the physical and astral forms that almost can’t be broken until death. It is the same thing that keeps your spirit linked to your body so you can always find your way back if you astral travel. We all have this connection and this can be both a good thing and a troublesome thing for some.
I have seen some people asking if injury to the human body can affect their connection to the astral body in any way. I have seen others laugh at them for suggesting such a claim. But it can be true in some cases. One thing that can go wrong is you can injure or calcify your pineal gland, or third eye. This will not stop you from using it completely but it could be said to be the equivalent of trying to see in fog or mist. It can make your astral sight and other related abilities harder to hone in. This does not necessarily mean losing your physical sight will affect your astral ability to see, but in some cases disconnects in the astral and the physical brain can cause the loss of the ability to visualize and see in the astral as long as you are connected to this body and vice versa. If you are “born” blind on the astral that doesn’t mean you will be born blind in the physical. Another thing that can happen to show the connection between the astral body and the physical is when someone loses a limb, but they can still feel a “phantom limb” this is because their astral form has been freed from the flesh and taken the form of the limb to help “heal” the body though it can’t physically help. But this phantom limb can help people to seem to feel prosthetics and function the technology we have today a bit easier.
Another connection we have is the ratio of our astral body vs physical. Just like the example of losing a limb, you can have more or less limbs than your physical body. Your astral body can be larger or smaller than your human body as well. Just because your body is human does not mean your spirit is. Spirit can be of anything energetic, any being or force in existence can make up your astral body. Some spirits just form from energies while others have vast spiritual bloodlines. Angelics, Demonics, Djinn, Draconic, Human, Vampiric, etc. Are all possible bloodlines for some. And beyond that there are trillions out there. These different spirit body types can contribute to other factors such as how connected you are to your physical body when you attempt things like astral travel, bilocation, energy work, why you might feel pain in certain spots, do you feel trapped in your physical body, cramped, unfilled, heavy, light? Do you have certain habits that you feel are deeper connected to your spirit? It can influence your emotions, habits, thoughts, personality, magickal ability and proficiency. All these things are possible things to consider when thinking about the connection between physical and astral.