Medically reviewed by Johnstone M. Kim, MD Key Takeaways The pupil controls how much light enters the eye, allowing for clear ...

Please provide your email address to receive an email when new articles are posted on . We tend to think of the pupil as a simple structure but, in fact, it is constantly in flux. The pupil is ...

Please provide your email address to receive an email when new articles are posted on . A 41-year-old woman was referred to the neuro-ophthalmology service at the New England Eye Center for left-sided ...