You are 38 and I presume you dont have any significant illnesses, havent been diagnosed incorrectly with asthma or told your GP in the distant past that you were depressed
Your only hurdle really is the eye test simply because the level required is high for an initial class one and a proportion of the healthy population will fail.
Otherwise you are only being asked to be medically normal. You dont need supernatural heart or lungs, and in any case medicine cant measure super normal, we only detect pathology in general terms. The chances of you failing are therefore infinitesimally low. A fraction of 1%. Dont let the word 'examination' terrify you. It is an inspection. Fear is your worst enemy. You cant prepare but you neednt unduly worry....but you will
