One of the most remarkable travel companies I have worked for in recent years is Traveleyes. They match blind or visually-impaired travellers with 'sighted guides'. I first joined a group on a trip to Cuba. It would be lazy journalism for me to say it was 'the most moving holidays I have ever experienced'. Yet the participants' spirit and uncomplaining independence was humbling in an environment that can easily overwhelm the senses. This is written as a tribute to one blind