‘His head and his hair were white as white wool, as white as snow.'
In Daniel 7:9 ‘the Ancient of Days', Who is the everlasting God, has hair like white wool, and raiment white as snow. There they represent everlastingness (great age) and righteousness. We can apply the same ideas here. Christ is depicted as the everlasting, righteous One. The book of Revelation constantly applies to Christ descriptions elsewhere used of God. It stresses His essential deity.
‘And his eyes were as a flame of fire.'
Compare Daniel 10:6 where the angel has ‘eyes like flaming torches'. Fire is constantly used to depict visions of the other world, for example on Mount Sinai (Exodus 24:17) and in Ezekiel (Ezekiel 1:27), (for its use of angels compare Hebrews 1:7), because of its unique splendour and purity. Perhaps it has within it here the idea of eyes of piercing judgment, for fire is the supreme tester (1Co 3:13; 2 Thessalonians 1:8; 1 Peter 1:7; Revelation 2:18; Revelation 19:12).