The rules in Qatar for visit visa is very different, age limit for visit visa has been fixed at 60 years, after that u have to get special permission from head of immmigration who sits at Gharrafa immigration centre, first u fill form and approach gharrafa immigration centre, they will ask you to get the signature of head of immigration, you approach him alongwith family with some genuine reason, he will sign and rest is easy, but your reason should be genuine, generally the person is good and he approves the visas. any more querries are there please write mail to me.