Covid test kit that is for the blind

for non sighted people,they cant do self testimg as there is no tactile indicator if it turns positive.ive wasted a few kits when saliva collected in funnel is invalid coz too much or too little saliva collected.the bloody indicator line is so faint.so i bought a test kit that uses a saliva swab that is easier to use for my blind sister.why cant they develop tactile incicators for blind so that a ridge appears when its positive.with omnicron so common,ibought a few kits n tested my family at home.last week,jun n i went to a commercial office when two employees were as tested positive.luckily we both tested negative so i bring my eucalyptus bacterial spray everywhete i go n use 4 ply mask.every other person around has asymptomatic covid