Visual issues - possibly neurological?

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I have complex sight problems: quite severe short-sightedness, moderate-severe astigmatism and convergent eye muscle weaknesses. My glasses and eye exercises help with that.

I also have Meares-Irlen Syndrome which I have tinted glasses for.

But I also cannot walk down most flights of stairs properly. If there are not very clear markings on the steps, then I have to go down very slowly, otherwise I end up falling down the stairs. This is because when I walk down them, the stairs all look like one big mass of grey (or whatever colour they are). Often the steps will move or I will see a step where there isn't a step.

I also cannot read small text. I have to increase the font size on my laptop and I have been given a 21 inch screen which I have connected to my laptop for this reason. However it is not blurriness that stops this. Small text, with my glasses on, I can see clearly, there is no blurring or double vision. But I still cannot read it, it is like it takes a ridiculously long time for my brain to process what the curves and lines mean on the small text.

Do you think the last two problems are neurological? What are your opinions on what is going on with me?

The problem with the stairs might not be neurological. I have a fairly severe astigmatism, and I if I look at stairs as I go down, I cannot distinguish one step from another, and the steps seem to move or grow or shrink (as they move through the part of my vision affected by the astigmatism). This is the same for tiled floors too. I have learned to not look at stairs as I go down (as the steps are all of uniform size within a stairway for modern buildings), and to hold on the the hand rail, and I do not go down fast, but neither am I going down super slow.

The problems recognizing the letters sounds like your brain has trouble interpreting the image. After all, letters are just pictorial representations of sounds or words. If the image is clear but you still have trouble interpreting them that could be a neurological problem. It does take me a little more time to read small text, but I have presbyopia, and the add in to my bifocals is stronger than my grandmother, so it is because I have trouble making out the letters, not interpreting them.

If a bigger screen and bigger letters help then do that. I know that I can make the words on the computer screen bigger with "Ctrl" plus "=/+" on my keyboard.

I hope that my post was helpful.