http://www.weldshop.co.uk/reactalite-welding-helmets-11-c.asp
have alook at the new sperian range which i love and the new speedglass .
its the quality of the twisting crystals that enables you to still see clearly when its in dark mode .
cheaper helmets when you have a slight eyesite problem tend to blur the weld .
should of gone to specsavers