Engelbert Humperdinck, 82, and Patricia, 79, have been married for 54 years
    His wife who was diagnosed with Alzheimer's 10 years ago has 24-hour care
    He shared his faith that Patricia's condition is improving and that he can heal
    The musician who has sold more than 150 million records reflected on his career
    Engelbert claims he doesn't know why Tom Jones doesn't get along with him
    The pair began sharing the same manager a year after Engelbert married

A career spanning more than 50 years, record sales of more than 150 million and friendships with legends such as Elvis Presley and Dean Martin might be accomplishment enough for most people. 

But Engelbert Humperdinck, purveyor of classics such as Release Me and The Last Waltz, has yet another, rather surprising string to his bow.

He chanced upon it several years ago while on tour in Germany. 

Suffering from a viral infection that he hadn't been able to shake for over four months, Engelbert visited an iridologist – an alternative therapist claiming to diagnose health problems by studying the eye's iris – who cured him within two weeks.