#eye lasers

The laser beams only appear in the beginning of the novel.

I've previously suggested in this article that they are one of several events from the historical Buddha's biography that the author-compiler of Journey to the West borrowed in order to make Sun Wukong's early life more familiar. The pertinent section reads:

Upon his birth, the Buddha is said to have “shed in every direction the rays of his glory” (fig. 3) (Beal, 1883, p. 3). The source continues to describe this light, as well as the Bodhisattva’s first few moments outside the womb:

His body, nevertheless, was effulgent with light, and like the sun which eclipses the shining of the lamp, so the true gold-like beauty of the Bodhisattva shone forth and was diffused everywhere. / Upright and firm and unconfused in mind, he deliberately took seven steps, the soles of his feet resting evenly upon the ground as he went, his footmarks remained bright as seven stars. / Moving like the lion, king of beasts, and looking earnestly towards the four quarters, penetrating to the centre the principles of truth, he spake thus…” (Beal, 1883, pp. 4-5).

The historical Xuanzang (on whom Tripitaka is based) notes in his travelogue that the Buddha even walks towards the cardinal directions: “After he had been born the Bodhisattva walked seven steps unaided to each of the four quarters … [u]nder each step a large lotus flower sprang up from the earth” (Xuanzang, 1996/2016, p. 158).

Wukong too produces a great light in every direction: “Having learned at once to climb and run, this monkey also bowed to the four quarters, while two beams of golden light flashed from his eyes to reach even the Palace of the Polestar” (fig. 4) (Wu & Yu, 2012, p. 101).

Therefore, both shine their lights in the four cardinal directions.

Fig. 3 – Baby Buddha producing a radiant splendor upon his birth (larger version). Artist unknown. Found on this article. Fig. 4 – Bright beams of light shine from Wukong’s eyes as he bows to the four directions (larger version). From the Japanese children’s book Son Goku (1939). 

Sources:

Beal, S. (Trans.). (1883). The Fo-sho-hing-tsan-king: A Life of Buddha by Asvaghosha Bodhisattva. Oxford: Clarendon Press. Retrieved from https://archive.org/details/foshohingtsankin00asva/mode/2up

Xuanzang (2016). The Great Tang Dynasty Record of the Western Regions (2nd ed., R. Li, trans.). California: BDK America, Inc. (Original work published 1996)