The average selfie takes 20 goes to get right, and even then it's never quite right. So, it's no surprise that the humble selfie is triggering a surge in cosmetic procedures. Plastic surgeon Rajiv Grover, who's noted that 17% of his new patients cite their DIY phone snaps for their interest in surgery, knows why.According to Grover, your mobile's lens and angle adds as much as seven years on to anyone over 40."A phone's 28mm camera lens does what time does to your face, enlarging the front of your face, so it looks bigger, and amplifies the features that get larger as you age. Add to that the fact that you tend to look down at your phone, which makes the skin on your neck and jowls look saggy."Beauty maths says that a youthful face is represented by a central facial triangle formed between the eyes and the lips."In a beautiful subject its appearance is not interrupted by either a big nose or heavy central features like nose to mouth lines or jowls," explains Grover.Then as we age, the volume in our cheeks diminishes and fat moves forward, "so that the balance of the outer face gets less and central face (inner cheek - nose to mouth lines and jowls) becomes heavier", he said.That's exactly what a wide-angled smartphone lens does to our facial contouring."The classic selfie resembles the older face rather than a younger face. By taking away the central triangle and exaggerating the central features the photo effects are actually mimicking the ageing process."So, what can you do to selfie-preserve your real age?" Hold the phone high above the face and to the side for sharper angles," Grover says. ..