"... Allison argues that ancient Jewish writers thought of the eye as functioning in the same way as the sun; thus, just as heavenly sources of light could become dimmed, so also the light of the eyes could be darkened. He maintains that they 'presuppose that the normal eye produces a subtle ray or light'. The difficulty with these examples is that many can be read in purely figurative or metaphorical terms. Against this potential objection, Allison posits a number of later noncanonical texts where the extramission theory is more plausible (e.g., 1 Enoch 106:2, 11). (Allison also compares this to the motif of fire coming forth from human and divine eyes, such as 2 Enoch 1:5; Daniel 10:6; Revelation 1:14, 2:18, 19:12; 3 Enoch 9:4; 18:25; 25:2-3. We should be careful in our dealings with passages describing the eyes of divine beings, particularly those in heavenly locations. Allison argues that these passages indicate that 'the normal eye produces a subtle ray or light, and that under the right circumstances or with exceptional individuals or supernatural beings such as angels, this light or ray can become intense and visible, even destructive') ..."