Under normal circumstances, there are no mirrors in cloisters. To me, this makes a great deal of sense and provides rich food for meditation.
The cloister is not a place for self-focus. One's eyes must begin to turn, there, from self to God. That is the point.
"This is the aim in religion, for in this consists Christian perfection: to die to self so perfectly that we can say with the apostle: 'the life I live is not my own; Christ is living in me.' (Galatians 2:20)." (St. Francis de Sales)
"Fix your eyes on Jesus." (Hebrews 3:1)
(painting in US public domain)