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).
1. Computer implemented method comprising the steps of: a) detecting the level of light emission that a light source emits into a user's ocular system; b) measuring the user's level of aversion to the amount of light received in his/her ocular system through analysis of the user's eye reaction; and c) 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). 2. The method of claim 1 further comprising a step of reducing the light emission of a light source to equal the acceptable level of aversion with the user's measured level of aversion. 3. A portable electronic device (100), comprising: a screen (126); one or more processors (106); a memory (102); a camera (200); and one or more programs (136 to 146) wherein the program(s) (132 to 146) are stored in the memory (102) and configured to be executed by the processor(s) (106); characterized in that the programs (132 to 146) include instructions for: a) detecting the level of light emission that a light source emits into a user's ocular system; b) 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 through at least one camera (200); c) 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). 4. The device (100) according to claim 3 comprising programmes including instructions to reduce the light emission of a light source to equal the acceptable level of aversion with the user's measured level of aversion. 5. The device (100) according to any of claims 3 or 4 that is portable. 6. A software product with instructions configured for execution by one or more processors that, when executing by an electronic device (100) according to any of claims 3 to 5, causes said device (5) to carry out the method according to any of claims 1 to 2.