Apparently Richard Kelner Williams was transferred from 1st Airlanding Squadron after 3 months, in July 1942, because they found sugar in his blood, although he wasn't diabetic. Does anyone know whether this would have been called a 'medical transfer' and why it mattered particularly in the airborne? He was transferred to 43rd Recce and went on to fight in Europe as a Lieutenant in 61st Recce.
Temporary hyperglycemia is often benign and asymptomatic. Blood glucose levels can rise well above normal for significant periods without producing any permanent effects or symptoms. However neurological damage, cardiovascular damage, and damage to the retina can cause problems, The Airborne medical was far more rigorous and any possible problems to the eyesight was a "Big No No". Thats why not many spectacle wearers served with the fighting elements of the Airborne units during WW2.