Evolution of retinal microvasculature abnormalities (areteriovenous ratio, arteriolar caliber and venular caliber) measured by automatic retinography, in patients suffering from essential hypertension of new onset and never treated, is associated with 5 years cardiovascular morbimortalityThe main objective is to verify if there is an association in newly-diagnosed and never treated hypertensive patients between:Arteriovenous ratio evolution measured by automatic retinography and 5 years cardiovascular morbimortalityArteriolar caliber evolution measured by automatic retinography and 5 years cardiovascular morbimortalityVenular caliber evolution measured by automatic retinography and 5 years cardiovascular morbimortalityThe secondary objective is to verify if there is an association between arteriovenous ratio baseline values and cardiovascular mortalityThe target population is composed by patients with essential hypertension of new onset and never treated, according to the ESH-ESC criteria, aged 35 to 74 years