I am making a lot of assumptions about what he meant by "water" and "house". Ideally I would need an Assessment and Plan (every doctor visit in history ends with this). You can get this by requesting the record from the office. It's yours, HIPPA says so
Anyway, here goes:
The primary problem with DM and the eyes is that it changes the microvasculature of your retinal blood vessels. Due to the toxicity, your body reacts by changing both the basement membrane of your vessels, as well as have many of what are called pericytes die.
The result of this is that the vessels leak. Blood will begin to seep out of the vessels and into the layers of the retina. Blood is toxic to the retinal cells, and this is "diabetic retinopathy". I am assuming by "water", he meant hemorrhages in the retina.
There are two big "houses", or things that MUST be avoided for a diabetic:
1) Conversion to what is termed "proliferative retinopathy"
2) Macular edema
1) Proliferative ---> Due to the vessels leaking, you actually get far less nutrition to the retinal cells. They become hypoxic, or lacking oxygen, and your body has a way of attempting to fix this problem that is actually harmful: it begins to grow little blood vessel nets to try to supply the starving retina.....these nets are what make your retinopathy "proliferative", and they can be very dangerous. These little vessels can bleed into the vitreous, or they can cause traction of the retina, causing a retinal detachment.....none of this is good.
I deal with people with proliferative retinopathy almost exclusively, and there are 2 options to stop it: Either you inject drugs into the eye directly (lots of fun. I use anesthetic!), or you laser the bleeding areas to cauterize them. We don't want you to ever have to see one of me. Your PCP will flip that one of us is being called, and demand an overhaul of everything EVERYONE is doing for you. All meds will be upped or changed, and a nutritionist will be assigned to you...which is where my nutritionist and I scold you, and in my case, push towards primal
2) Macular Edema ----> In this case, the leakiness of the vessels has caused swelling in the focused part of your vision, the macula....when you look at anything, at a stop sign or this screen, you are essentially pointing your maculas at it. This is the area of max photoreceptors. Without it functioning well, you don't see well, period....the severity of the edema can vary by a lot. Sometimes you won't even notice and only a doctor will pick it up. Others you could get very bad vision out of.
The main job of your optometrist or general ophthalmologist is to ensure that neither of these conditions develop....the eye is neural tissue. Once it is dead, it is dead forever. That is why in medicare it is mandatory all diabetics be seen by an eye doc every year. If it is let alone it can be catastrophic....if these measures fail, you come see me
Try to get any info you can about what condition he is concerned about....regardless, the main thing you can do is to control your BG range. What is the highest/lowest its been in the last 2 weeks? Last Hba1c?
Sorry if that was technical, but I say a derivation of it to all my patients. I don't use analogies only. Details matter, so I tend to give as many as possible. Hope this helps