If the scars occur, permanent vision loss can happen. In effect, they function as 'fake cry.' The quest to manufacture human-like tears continues in laboratories in the world. http://[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@[email protected]@silvia.woodw