Assertion: pointer's energy | /r/HasProperty | entered the eye
Facets:
value: to cause irreversible change
type: PURPOSE
Source sentences:
text: Class 2 systems must emit visible radiation (400–780 nm) and have an upper limit of output power of 1 mW. These systems are eye safe by virtue of the fact that if they fall upon the eye they are sufficiently bright that exposed individuals will blink and turn their heads away before sufficient energy has entered the eye to cause irreversible change.