Johnny Dangerous wrote:What's difference between imagining something visually and visualizing it, aren't those about the same thing?
The language is getting in the way - the difference I was getting at is generating an imaginary image in your mind and actually creating the image visually. I have found some people who try to do that at first - actually generate a visual image that they see with their eyes. Some people can do that but I think what is happening is that they have transferred an imaginary image to actual visual consciousness. Because they use their eyes, they can get tired quickly or have some kind of eye issues (like crossed eyes).
Apparently you aren't doing this just your eyes begin to behave as if it were happening. These systems are really not 100% separate to begin with but I haven't encountered eye crossing problems if someone isn't trying to physically generate an image before.
It takes a little time to happen usually, for instance a shamatha mediation of visualizing a blue light at the heart as my object, in the beginning it's fine, but after a bit my eyes may start to try refocusing constantly, even though technically i'm not seeing anything, it's exactly the same if I try focusing on an actual object such as a rock.
WOW! I was going to suggest just meditate with lights rather than the whole image.
Maybe shorter meditation but with as much detail without strain as you can. So 2-5 minutes at a time and just focus on the sadhana and mantra without much visualization.