Hi,
The transition to lower carbs can be an uncomfortable time, so you have my sympathy! But congratulations on the lowered blood glucose. That is a great improvement.
You'll probably find exercise a bit challenging until you transition so be gentle with yourself.
Voleck and Phinney have been researching low carb in athletes for over 20 years, and they've written a couple of books on the subject you may find interesting. Both titles begin with 'the art and science of low carb...'
A lot of things happen to us when we lowered the carbs, and it takes a few days up to a couple of months (yes, months) for the body to adjust properly, depending on how fast you cut the carbs, and how low carb you go.
The key thing is are you eating enough? By cutting carbs, the body loses the instant access energy, and has to learn how to access its fat reserves. This can leave us in a lacklutre wobbly floppy limbo for a while. But don't worry. If/when you enter 'fat burning mode' the energy comes flooding back. And (for me) it is a better, more consistent, more resilient energy supply. V&P say that their athletes are back up to full performance 6-8 weeks after going very low carb.
The blurred vision is, as
@Kristin251 says, quite likely because of the rapid drop in blood glucose. The high sugar levels affect the focal length of the eye. I will spare you the boring techy explanation that i don't really understand. But the important thing is that it will pass. Once your bgs stabilise, your eyes will stop blurring. Some people find they can go back to old glasses, becauses the blood glucose has been affecting their eyes for years.
If your eyes dont improve in a few days, it would be worth ringing an optician and asking if theyneed to see you.
The dizzyness could be several things - dropping bgs, dropping blood pressure, lower salt intake (the first few weeks of low carbing, the body sheds salt and water. Are you on any blood pressure medication? Low carbing - and the weight loss that often happens as a result of low carbing - may also reduce blood pressure. So if you are on meds, they may need adjusting which you doc can help with. Otherwise, the salt thing is very easily rectified. A cup of Bovril, a sprinkle of salt on your food, even a stock cube made into a kind of cuppa soup with hot water will help.
I have seen people post that a single cup of Bovril has made them feel hugely better, so worth a try
Some people also find potassium and magnesium go low on low carb, and you may want to read up on that.
No idea if you are attempting major weight loss as well as low carb, but i strongly believe that it is better to adjust to low carb before you start reducing intake with a weight loss diet/low calorie thing. Both changes at once can be a bit hard to cope with. So for the first week or two, don't try going hungry, and have a low carb snack (nuts, coffee with cream, berries and cream, cold meat, cheese) rather than enduring wobbly hunger and carb cravings. Your appetite may naturally shrink after a while and then you will forget to snack.
Hope that helps!