▁Athlet es ▁with ▁a ▁physical ▁dis ability ▁or ▁vision ▁imp air ment . ▁R iders ▁with ▁moder ate ▁un il ater al ▁imp air ment , ▁moder ate ▁imp air ment ▁in ▁four ▁lim bs ▁or ▁severe ▁arm ▁imp air ment . ▁In ▁day ▁to ▁day ▁life , ▁rid ers ▁are ▁usually ▁amb ul ant ▁but ▁some ▁may ▁use ▁a ▁wheel ch air ▁for ▁longer ▁distances ▁or ▁due ▁to ▁lack ▁of ▁stam ina . ▁R iders ▁with ▁a ▁vision ▁imp air ment ▁who ▁comp ete ▁in ▁this ▁class ▁have ▁total ▁loss ▁of ▁sight ▁in ▁both ▁eyes ▁( B 1 ). " ▁ ▁Federation ▁E quest re ▁International ▁defines ▁Gra de ▁ 5 ▁as ▁ ▁" At ▁this ▁level ▁the ▁r ider ▁will ▁ride ▁an ▁elementary / medium ▁level ▁test " ▁The ▁Australian ▁Par al ym pic ▁Committee ▁defined ▁this ▁classification ▁as : ▁" G rade ▁V : , ▁Athlet es ▁with ▁a ▁physical ▁dis ability ▁or ▁vision ▁imp air ment . ▁R iders ▁have ▁a ▁physical ▁imp air ment ▁in ▁one ▁or ▁two ▁lim bs ▁( for ▁example ▁lim b ▁loss ▁or ▁lim b ▁def ic iency ), ▁or ▁some ▁degree ▁of ▁visual ▁imp air ment ▁( B 2 ). " ▁ ▁Para - d riv ing ▁classification ▁ ▁Para - d riv ing ▁util izes ▁a ▁different ▁classification ▁system ▁than ▁para - d ress age ▁events , ▁and ▁includes ▁only ▁two ▁classes : ▁Gra de ▁I ▁and ▁Gra de ▁II . ▁ ▁Gra de ▁ 1 ▁is ▁for ▁people ▁who ▁use ▁a