Method and electronic device for detecting the level of light emission that a light source emits into a user's ocular system; measuring the user's level of aversion to the amount of light received in his/her ocular system through analysis of his/her eye reaction; and comparing the level of aversion to the amount of light received by his/her ocular system measured in step (b) to the level of aversion acceptable for that user and stored in a memory (102) of an electronic device (100).