Blurred Vision after Exercise

I am 29y.o. male, non-smoker, eat well, healthy weight.

Since returning to the gym a month or so ago, I have found that the day following my workout I have blurred vision, and cannot read a book or computer screen for more than a minute or two. After that I just feel like closing my eyes and lying down. This lasts for maybe 4 or 5 hours. I don't think there are any other symptoms to speak of, except maybe some imbalance and dizziness when I stand up too quickly.

I drink plenty of water - whether I'm working out or not.

I am going to see my GP this week, but cannot help but worry in the meantime. I've read about this online and have correlated the symptoms with MS.

[caregiver222]

There is a possibility of MS, but it is more likely you have an insulin utilization syndrome. Blurred vision, excessive thirst, and sleepiness are hallmarks for this diagnosis.

You require a glucose fasting test or an insulin clamp protocol.

If these test(s) come out within normal limits, your physician can go on to explore more exotic etiologies.

I don't know for certain what is wrong with you, but a fasting test is the first step in a diagnosis.

[caregiver222]

I will add some reasons for my guess. Your dizziness when standing up could be due to a failure of the peripheral vasculature to contract (postural syncope), but it is also characteristic of dehydration.

The excessive thirst and dehydration suggests something is causeing your body to use excess water.  When insulin is not available in sufficient quantities, the body switches to an alternate method to reduce sugar levels. This alternate mechanism uses up a lot of water, and often results in dehydration.

Often, there is a sweet smell to the urine, caused by what are called ketones.

I'm sure your GP will know exactly what to do.

[Kasey Bee]

Thanks for that. I saw my GP today and we're starting with an eye examination. He did ask me about excessive thirst but - to be honest - I'm not sure what excessive is. I drink maybe 1L-1.5L of water a day just sitting at my desk in the office.