Sharing tips for taking good comparison photos by medical specialty.

Consistent lighting, a solid background, and a fixed distance are essential, as are facial expressions and hair styling. For dentistry, keep your mouth open; for ophthalmology, keep your eyes open; for hair loss, a close-up of the crown of your head; and for skin care, no makeup and UV protection markings. It is also a good idea to keep records of the shooting date and medication intake.